SUMMARY

The following summary contains certain information described in more detail elsewhere in this document. It does not contain all the details concerning the Transactions, including information that may be important to you. To better understand the Transactions, you should carefully review this entire document and the documents it refers to. See “Where You Can Find More Information; Incorporation by Reference.”

The Companies

Georgia Gulf Corporation

Georgia Gulf Corporation

115 Perimeter Center Place, Suite 460

Atlanta, Georgia 30346

Telephone: (770) 395-4500

Georgia Gulf Corporation is a leading, integrated North American manufacturer and international marketer of chemicals and building products. Georgia Gulf manufactures two chemical lines, chlorovinyls and aromatics, as well as vinyl-based building and home improvement products. Georgia Gulf’s vinyl-based building and home improvement products, marketed under the Royal Building Products and Exterior Portfolio brands, include window and door profiles, mouldings, siding, pipe and pipe fittings and deck products. Georgia Gulf, headquartered in Atlanta, Georgia, has manufacturing facilities located throughout North America to provide industry-leading service to customers.

Grizzly Acquisition Sub, Inc.

Grizzly Acquisition Sub, Inc.

c/o Georgia Gulf Corporation

115 Perimeter Center Place, Suite 460

Atlanta, Georgia 30346

Telephone: (770) 395-4500

Grizzly Acquisition Sub, Inc., a Delaware corporation referred to in this document as Merger Sub, is a newly formed, direct wholly-owned subsidiary of Georgia Gulf that was organized specifically for the purpose of completing the Merger. Merger Sub has engaged in no business activities to date and it has no material assets or liabilities of any kind, other than those incident to its formation and in connection with the Transactions.

PPG Industries, Inc.

PPG Industries, Inc.

One PPG Place

Pittsburgh, Pennsylvania 15272

Telephone: (412) 434-3131

PPG Industries, Inc., incorporated in Pennsylvania in 1883, is a leading coatings and specialty products company. PPG’s net sales in 2011 totaled $14,885 million and 2011 net income was $1,095 million. PPG’s corporate headquarters is located in Pittsburgh, Pennsylvania. PPG has manufacturing facilities, sales offices, research and development centers and distribution centers located throughout the world. At December 31, 2011 PPG operated 128 manufacturing facilities in 45 countries.

Eagle Spinco Inc.

Eagle Spinco Inc.

c/o PPG Industries, Inc.

One PPG Place

Pittsburgh, Pennsylvania 15272

Telephone: (412) 434-3131

Eagle Spinco Inc., a Delaware corporation referred to in this document as Splitco, is a newly formed, direct wholly-owned subsidiary of PPG that was organized specifically for the purpose of effecting the Separation. Splitco has engaged in no business activities to date and it has no material assets or liabilities of any kind, other than those incident to its formation and those incurred in connection with the Transactions.

Splitco is a holding company. In the Transactions, PPG will transfer the assets and liabilities related to the PPG Chlor-alkali and Derivatives Business, including certain subsidiaries of PPG, to Splitco or one of its subsidiaries. In exchange therefor, PPG will receive all the issued and outstanding common stock of Splitco, the cash proceeds of approximately $225.0 million from the Term Facility and the Debt Securities in an aggregate principal amount of approximately $675.0 million. The PPG Chlor-alkali and Derivatives Business produces chlor-alkali and derivative products, including chlorine, caustic soda, VCM, chlorinated solvents, calcium hypochlorite, ethylene dichloride, HCL and phosgene derivatives. For the fiscal year ended December 31, 2011, the PPG Chlor-alkali and Derivatives Business generated net sales of $1,741.0 million and net income of $233.0 million.

The Transactions

On July 19, 2012, Georgia Gulf and PPG announced that they, along with Splitco and Merger Sub, had entered into the Merger Agreement, and that PPG and Splitco had entered into the Separation Agreement, which together provide for the combination of Georgia Gulf’s business and the PPG Chlor-alkali and Derivatives Business. In the Transactions, PPG will transfer the PPG Chlor-alkali and Derivatives Business to Splitco. Prior to the Distribution, PPG will receive the cash proceeds of approximately $225.0 million from borrowings under the Term Facility through a distribution in connection with the Separation and prior to the consummation of the Merger. PPG will also receive approximately $675.0 million in Debt Securities, which are expected to be issued by Splitco to PPG prior to the Distribution, and then transferred on or about the closing date of the Merger to investment banks and/or commercial banks in satisfaction of the debt obligations of PPG described in the section of this document entitled “Debt Financing—PPG Bridge Facility.”

On the closing date of the Merger, PPG will distribute shares of Splitco common stock to its participating shareholders in an exchange offer. If the exchange offer is consummated but is not fully subscribed, PPG will distribute the remaining shares of Splitco common stock on a pro rata basis to PPG shareholders whose shares of PPG common stock remain outstanding after consummation of the exchange offer. Any PPG shareholder who validly tenders (and does not properly withdraw) shares of PPG common stock for shares of Splitco common stock in the exchange offer will waive their rights with respect to such shares to receive, and forfeit any rights to, shares of Splitco common stock distributed on a pro rata basis to PPG shareholders in the event the exchange offer is not fully subscribed. If there is a pro rata distribution, the exchange agent will calculate the exact number of shares of Splitco common stock not exchanged in the exchange offer and to be distributed on a pro rata basis, and the number of shares of Georgia Gulf common stock into which the remaining shares of Splitco common stock will be converted in the Merger will be transferred to PPG shareholders (after giving effect to the consummation of the exchange offer) as promptly as practicable thereafter. Immediately after the Distribution and on the closing date of the Merger, Merger Sub will merge with and into Splitco, whereby the separate corporate existence of Merger Sub will cease and Splitco will continue as the surviving company and a wholly-

owned subsidiary of Georgia Gulf. In the Merger, each share of Splitco common stock will be converted into the right to receive Georgia Gulf common stock based on the exchange ratio set forth in the Merger Agreement, as described in the section of this document entitled “The Merger Agreement—Merger Consideration.”

Georgia Gulf expects to issue approximately 35,236,010 shares of Georgia Gulf common stock in the Merger, although the exact number of shares to be issued in the Merger will not be known until the closing date. Based upon the reported closing sale price of $45.65 per share for Georgia Gulf common stock on the NYSE on November 26, 2012 and the 34,538,268 shares of Georgia Gulf common stock issued and outstanding on November 26, 2012, the total value of the shares expected to be issued by Georgia Gulf and the amount of cash received by PPG in the Transactions, including the Term Facility and the Debt Securities, which will be the obligations of Splitco and, following the consummation of the Merger, will be guaranteed by Georgia Gulf, would have been approximately $2,508.5 million. The value of the consideration to be paid by Georgia Gulf in the Merger will be computed using the value of Georgia Gulf common stock on the closing date, and therefore, the actual purchase price will fluctuate with the market price of Georgia Gulf common stock until the Merger is consummated.

After the Merger, Georgia Gulf will own and operate the PPG Chlor-alkali and Derivatives Business through Splitco, which will be Georgia Gulf’s wholly-owned subsidiary, and will also continue its current businesses. All shares of Georgia Gulf common stock, including those issued in the Merger, will be listed on the NYSE under Georgia Gulf’s current trading symbol “GGC.”

Below is a step-by-step description of the sequence of material events relating to the Transactions.

Step 1    Separation

PPG will transfer to Splitco, a newly formed, direct wholly-owned subsidiary of PPG, the PPG Chlor-alkali and Derivatives Business. This transfer to Splitco will include, among the other assets and liabilities of the PPG Chlor-alkali and Derivatives Business, PPG’s (1) 50% interest in PHH Monomers, LLC (“PHH”), a joint venture with Georgia Gulf and (2) 50% interest in RS Cogen, L.L.C. (“RS Cogen”), a joint venture with an affiliate of Entergy Corporation. PPG is currently discussing with its joint venture partner, China Petrochemical Development Corporation (“CPDC”), the potential transfer of the TCI Interests to Splitco, or a subsidiary thereof. In the event that PPG does not convey the TCI Interests at or prior to the effective time of the Separation to Splitco, or a subsidiary thereof, the Special Distribution will be reduced by $130 million. Georgia Gulf does not believe that there would be a material adverse impact on the combined business after the consummation of the Merger if the TCI Interests were not to be transferred as part of the Transactions.

Step 2    Incurrence of Debt

Prior to the Distribution, Splitco will incur new indebtedness in the form of the Term Facility in the amount of approximately $225.0 million and issue approximately $675.0 million in aggregate principal amount of Debt Securities to PPG. PPG will ultimately receive the cash proceeds from the approximately $225.0 million term loan under the Term Facility through a distribution in connection with the Separation and prior to the consummation of the Merger. PPG is then expected to transfer the Debt Securities on or about the closing date of the Merger to investment banks and/or commercial banks in satisfaction of the debt obligations of PPG described in the section of this document entitled “Debt Financing—PPG Bridge Facility.” The Debt Securities are subsequently expected to be sold by the investment banks and/or commercial banks to third-party investors as described below. PPG is expected to receive approximately $900.0 million in cash from the Term Facility and Debt Securities.

Step 3    Distribution—Exchange Offer

PPG will offer to PPG shareholders the right to exchange all or a portion of their shares of PPG common stock for shares of Splitco common stock at a discount to the per-share value of Georgia Gulf common stock in an exchange offer.

If the exchange offer is consummated but is not fully subscribed, PPG will distribute the remaining shares of Splitco common stock on a pro rata basis to PPG shareholders whose shares of PPG common stock remain outstanding after consummation of the exchange offer. Any PPG shareholder who validly tenders (and does not properly withdraw) shares of PPG common stock for shares of Splitco common stock in the exchange offer will waive their rights with respect to such shares to receive, and forfeit any rights to, shares of Splitco common stock distributed on a pro rata basis to PPG shareholders in the event the exchange offer is not fully subscribed. If there is a pro rata distribution, the exchange agent will calculate the exact number of shares of Splitco common stock not exchanged in the exchange offer and to be distributed on a pro rata basis, and the number of shares of Georgia Gulf common stock into which the remaining shares of Splitco common stock will be converted in the Merger will be transferred to PPG shareholders (after giving effect to the consummation of the exchange offer) as promptly as practicable thereafter.

The exchange agent will hold, for the account of the relevant PPG shareholders, the global certificate(s) representing all of the outstanding shares of Splitco common stock, pending the consummation of the Merger. Shares of Splitco common stock will not be able to be traded during this period.

As previously noted, Splitco has prepared this document under the assumption that the shares of Splitco will be distributed to PPG shareholders pursuant to a split-off. Based on market conditions prior to closing, PPG will determine whether the Splitco shares will be distributed to PPG’s shareholders in a spin-off or a split-off and, once a final decision is made, this document will be amended to reflect that decision, if necessary.

Step 4    Merger

Immediately after the Distribution, and on the closing date of the Merger, Merger Sub will merge with and into Splitco, whereby the separate corporate existence of Merger Sub will cease and Splitco will continue as the surviving company and as a wholly-owned subsidiary of Georgia Gulf. In the Merger, each share of Splitco common stock will be converted into the right to receive Georgia Gulf common stock based on the exchange ratio set forth in the Merger Agreement, as described in the section of this document entitled “The Merger Agreement—Merger Consideration.” Following the consummation of the Merger, Georgia Gulf and certain of its subsidiaries will guarantee the Term Facility and the Debt Securities.

Immediately after consummation of the Merger, 50.5% of Georgia Gulf common stock is expected to be held by pre-Merger holders of Splitco common stock and 49.5% of Georgia Gulf common stock is expected to be held by pre-Merger Georgia Gulf stockholders, subject to potential adjustment under limited circumstances as described in the section of this document entitled “The Merger Agreement—Merger Consideration.”

Step 5    Sale of Debt Securities to Third-Party Investors

As described in Step 2 above, Georgia Gulf and PPG expect the Debt Securities to be transferred by PPG on or about the closing date of the Merger to investment banks and/or commercial banks in the Debt Exchange in exchange for debt obligations of PPG described in the section of this document entitled “Debt Financing—PPG Bridge Facility.” The Debt Securities will then be sold by the investment banks and/or commercial banks to third-party investors pursuant to an exemption from registration under the Securities Act in either a private placement or a “Rule 144A” transaction.

Set forth below are diagrams that graphically illustrate, in simplified form, the existing corporate structure, the corporate structure immediately following the Distribution, and the corporate structure immediately following the consummation of the Transactions contemplated by the Merger Agreement.

After completion of all of the steps described above:

Immediately after consummation of the Merger, 50.5% of Georgia Gulf common stock is expected to be held by pre-Merger holders of Splitco common stock and 49.5% of Georgia Gulf common stock is expected to be held by pre-Merger Georgia Gulf stockholders, subject to potential adjustment under limited circumstances as described in the section of this document entitled “The Merger Agreement—Merger Consideration.” In connection with the Transactions, Georgia Gulf, Merger Sub, PPG and/or Splitco have entered into or will enter into the Additional Agreements relating to, among other things, certain tax matters, certain employee matters, the provision of certain transition services during a transition period following the consummation of the Transactions and the sharing of facilities, services and supplies. See “Other Agreements.”

Various factors were considered by Georgia Gulf and PPG in negotiating the terms of the Transactions, including the equity ownership levels of Georgia Gulf stockholders and the PPG shareholders receiving shares of Georgia Gulf common stock in the Distribution. The principal factors considered by the parties negotiating the terms of the Transactions were the strategic and financial benefits that could be expected to be achieved by combining Georgia Gulf and the PPG Chlor-alkali and Derivatives Business relative to the future prospects of Georgia Gulf on a standalone basis, the relative actual results of operations and prospects of Georgia Gulf and of the PPG Chlor-alkali and Derivatives Business, synergies expected to be realized in the combination, as well as other alternatives that may be available to Georgia Gulf, and the risks and uncertainties associated with the Transactions and with such alternatives, and the other factors identified in the sections of this document entitled “The Transactions—Background of the Transactions” and “The Transactions—Georgia Gulf’s Reasons for the Transactions.” PPG also considered, among other things, the value to PPG and PPG’s shareholders that could be realized in the Transactions as compared to the value to PPG and PPG’s shareholders that could be realized if the Transactions did not occur, the proposed tax treatment of the Transactions, and the other factors identified in the section of this document entitled “The Transactions—PPG’s Reasons for the Transactions.”

Number of Shares of Splitco Common Stock to Be Distributed to PPG Shareholders

PPG is offering to exchange all shares of Splitco common stock for shares of PPG common stock validly tendered and not properly withdrawn. Splitco will authorize the issuance of a number of shares of Splitco common stock such that the total number of shares of Splitco common stock outstanding immediately prior to the effective time of the Merger will equal the greater of (i) 35,200,000 shares or (ii) the product of (x) the number of shares of Georgia Gulf common stock issued and outstanding immediately prior to the effective time of the Merger multiplied by (y) 1.02020202, subject to adjustment in certain circumstances. Accordingly, the total number of shares of Splitco common stock outstanding immediately prior to the effective time of the Merger to be exchanged for shares of PPG common stock in the exchange offer will be equal to the number of shares of Georgia Gulf common stock to be issued in the Merger. See “The Merger Agreement—Merger Consideration.”

Terms of this Exchange Offer

PPG is offering holders of shares of PPG common stock the opportunity to exchange their shares for shares of Splitco common stock. You may tender all, some or none of your shares of PPG common stock. This

document and related documents are being sent to persons who directly held shares of PPG common stock on December 27, 2012 and brokers, banks and similar persons whose names or the names of whose nominees appear on PPG’s shareholder list or, if applicable, who are listed as participants in a clearing agency’s security position listing for subsequent transmittal to beneficial owners of PPG’s common stock.

PPG common stock validly tendered and not properly withdrawn will be accepted for exchange at the exchange ratio determined as described under “This Exchange Offer—Terms of this Exchange Offer,” on the terms and conditions of this exchange offer and subject to the limitations described below, including the proration provisions. PPG will promptly return any shares of PPG common stock that are not accepted for exchange following the expiration of this exchange offer and the determination of the final proration factor, if any, described below.

For the purposes of illustration, the table below indicates the number of shares of Splitco common stock that you would receive per share of PPG common stock you validly tender, calculated on the basis described under “This Exchange Offer—Terms of this Exchange Offer” and taking into account the upper limit, assuming a range of averages of the daily VWAP of PPG common stock and Georgia Gulf common stock on the Valuation Dates. The first row of the table below shows the indicative calculated per–share values of PPG common stock and Splitco common stock and the indicative exchange ratio that would have been in effect following the official close of trading on the NYSE on December 26, 2012, based on the daily VWAPs of PPG common stock and Georgia Gulf common stock on December 21, 2012, December 24, 2012 and December 26, 2012. The table also shows the effects of a 10% increase or decrease in either or both the calculated per–share values of PPG common stock and Splitco common stock based on changes relative to the values as of December 26, 2012.

During the three–month period of September 26, 2012 through December 26, 2012, the highest closing price of PPG common stock on the NYSE was $135.24 and the lowest closing price of Georgia Gulf common stock on the NYSE was $35.39. If the calculated per–share values of PPG common stock and Splitco common stock equaled these closing

prices, you would have received only the limit of 3.9745 shares of Splitco common stock for each share of PPG common stock tendered, and the value of such shares of Splitco common stock, based on the Georgia Gulf common stock price, would have been approximately $1.04 of Splitco common stock for each $1.00 of PPG common stock accepted for exchange.

Extension; Termination

This exchange offer, and your withdrawal rights, will expire at 8:00 a.m., New York City time, on January 28, 2013, unless this exchange offer is extended. You must tender your shares of PPG common stock prior to this time if you want to participate in this exchange offer. PPG may extend or terminate this exchange offer as described in this document.

Mandatory Extension

If the upper limit on the number of shares that can be received for each share of PPG common stock tendered is in effect at the expiration of the exchange offer period, then the exchange ratio will be fixed at the upper limit and a Mandatory Extension of this exchange offer will be made until 8:00 a.m., New York City time, on the day after the second trading day following the last trading day prior to the originally contemplated expiration date.

In case of an extension of this exchange offer (mandatory or otherwise), PPG will publicly announce the extension by press release no later than 9:00 a.m., New York City time, on the previously scheduled expiration date.

Conditions for Consummation of this Exchange Offer

PPG’s obligation to exchange shares of Splitco common stock for shares of PPG common stock is subject to the conditions listed under “This Exchange Offer—Conditions for Consummation of this Exchange Offer,” including the satisfaction of conditions to the Transactions and other conditions. These conditions include:

For a description of the material conditions precedent to the Transactions, see “The Merger Agreement—Conditions to the Merger.”

PPG may waive any of the conditions to this exchange offer prior to the expiration of this exchange offer. Splitco has no right to waive any of the conditions to this exchange offer.

Proration; Odd-Lots

If, upon the expiration of this exchange offer, PPG shareholders have validly tendered more shares of PPG common stock than PPG is able to accept for exchange (taking into account the exchange ratio and the total number of shares of Splitco common stock owned by PPG), PPG will accept for exchange the shares of PPG common stock validly tendered and not properly withdrawn by each tendering shareholder on a pro rata basis, based on the proportion that the total number of shares of PPG common stock to be accepted bears to the total number of shares of PPG common stock validly tendered and not properly withdrawn (rounded to the nearest whole number of shares of PPG common stock, and subject to any adjustment necessary to ensure the exchange of all shares of Splitco common stock owned by PPG), except for tenders of odd-lots, as described below.

PPG will announce the proration factor at http://www.edocumentview.com/PPGINDUSTRIES and separately by press release promptly after the expiration date. Upon determining the number of shares of PPG common stock validly tendered for exchange and not properly withdrawn, PPG will announce the final results of the exchange offer, including the final proration factor.

Beneficial holders (other than plan participants in the PPG Employee Savings Plan or PPG Defined Contribution Retirement Plan) of less than 100 shares of PPG common stock who validly tender all of their shares may elect not to be subject to proration by completing the box in the applicable letter of transmittal entitled “Odd-Lot Shares.” If your odd-lot shares are held by a broker for your account, you can contact the broker and request this preferential treatment. All of your odd-lot shares will be accepted for exchange without proration if PPG completes this exchange offer.

Fractional Shares

Immediately following the consummation of this exchange offer, Merger Sub will be merged with and into Splitco, whereby the separate corporate existence of Merger Sub will cease and Splitco will continue as the surviving company and a wholly-owned subsidiary of Georgia Gulf. Each outstanding share of Splitco common stock will be converted into the right to receive a number of shares of Georgia Gulf common stock equal to (a) the greater of (i) 35,200,000 shares of Georgia Gulf common stock or (ii) the product of (x) the number of shares of Georgia Gulf common stock issued and outstanding immediately prior to the effective time of the Merger multiplied by (y) 1.02020202, divided by (b) the number of shares of Splitco common stock issued and outstanding immediately prior to the effective time of the Merger. In this conversion of shares of Splitco common stock into shares of Georgia Gulf common stock, no fractional shares of Georgia Gulf common stock will be delivered to holders of Splitco common stock. All fractional shares of Georgia Gulf common stock that a holder of shares of Splitco common stock would otherwise be entitled to receive as a result of the Merger will be aggregated by Georgia Gulf’s transfer agent. The transfer agent will cause the whole shares obtained thereby to be sold on behalf of such holders of shares of Splitco common stock that would otherwise be entitled to receive such fractional shares of Georgia Gulf common stock in the Merger, in the open market or otherwise as reasonably directed by PPG, and in no case later than five business days after the Merger. The transfer agent will make available the net proceeds thereof, after deducting any required withholding taxes and brokerage charges, commissions and transfer taxes, on a pro rata basis, without interest, as soon as practicable to the holders of Splitco common stock that would otherwise be entitled to receive such fractional shares of Georgia Gulf common stock in the Merger.

Procedures for Tendering

For you to validly tender your shares of PPG common stock pursuant to this exchange offer, prior to the expiration of this exchange offer:

Delivery of Shares of Splitco Common Stock

Upon consummation of this exchange offer, PPG will irrevocably deliver to the exchange offer agent a global certificate representing all of the Splitco common stock being exchanged in this exchange offer, with irrevocable instructions to hold the shares of Splitco common stock in trust for the holders of shares of PPG common stock validly tendered and not properly withdrawn in the exchange offer and, in the case of a pro rata distribution, if any, PPG shareholders whose shares of PPG common stock remain outstanding after the consummation of the exchange offer. Georgia Gulf will deposit with the transfer agent for the benefit of persons who received shares of Splitco common stock in this exchange offer certificates or book-entry authorizations representing shares of Georgia Gulf common stock, with irrevocable instructions to hold the shares of Georgia Gulf common stock in trust for the holders of Splitco common stock. Shares of Georgia Gulf common stock will be delivered immediately following the expiration of this exchange offer, the acceptance of PPG common stock for exchange, the determination of the final proration factor, if any, and the effectiveness of the Merger, pursuant to the procedures determined by the exchange offer agent and PPG’s transfer agent. See “This Exchange Offer—Terms of this Exchange Offer—Exchange of Shares of PPG Common Stock.”

Withdrawal Rights

You may withdraw your tendered PPG common stock at any time prior to the expiration of this exchange offer by following the procedures described herein. If you change your mind again, you may re-tender your PPG common stock by again following the exchange offer procedures prior to the expiration of this exchange offer.

When Distributed and When Issued Markets

PPG will announce the preliminary proration factor by press release promptly after the expiration of the exchange offer. At the expiration of the guaranteed delivery period (three NYSE trading days following the expiration of the exchange offer), PPG will confirm the final results of the exchange offer, including the final proration factor, with the exchange agent. Promptly after the final results are confirmed, PPG will issue a press release announcing the final results of the exchange offer, including the final proration factor.

PPG has been informed by the NYSE that, in the event a proration is necessary, the NYSE expects to create a “when distributed” market for the shares of PPG common stock not accepted for exchange in the exchange offer if the NYSE determines that the creation of such a market would be useful to allow investors to facilitate transactions in those shares. The “when distributed” market would be created promptly following PPG’s

announcement of the preliminary proration factor. In the “when distributed” market, PPG shareholders whose shares are not accepted for exchange in the exchange offer will be able to sell their rights to receive shares of PPG common stock when those shares are returned by PPG as described above. Such selling shareholders will, however, retain voting and dividend rights with respect to shares sold in the “when distributed” market accruing to shareholders of record as of any record date occurring prior to the date those shares are returned. Purchasers of shares of PPG common stock in the “when distributed” market will acquire the right to receive the shares of PPG common stock when those shares are returned by PPG as described above but will not acquire voting or dividend rights with respect to those shares until those shares are received by the record holder and credited to the account of the purchaser. After the shares of PPG common stock not accepted for exchange in the exchange offer are returned, “when distributed” trading with respect to shares of PPG common stock will end.

In addition, Georgia Gulf has been informed by NYSE that it expects to create a “when issued” market for the new shares of Georgia Gulf common stock issuable to PPG shareholders whose shares of PPG common stock are accepted for exchange in the exchange offer promptly following PPG announcement of the preliminary proration factor. In the “when issued” market, PPG shareholders whose shares are accepted for exchange in the exchange offer will be able to sell their rights to receive shares of Georgia Gulf common stock when those shares are issued and delivered by Georgia Gulf’s transfer agent. Purchasers of shares of Georgia Gulf common stock in the “when issued” market will acquire the right to receive shares of Georgia Gulf common stock when those shares are issued and delivered by Georgia Gulf’s transfer agent. These rights are not actual shares of Georgia Gulf common stock and do not entitle holders to voting or dividend rights with respect to shares of Georgia Gulf common stock. After the shares of Georgia Gulf common stock issuable to PPG shareholders are issued and delivered, “when issued” trading with respect to shares of Georgia Gulf common stock will end.

Any trades made in the “when distributed” and “when issued” markets will be made contingent on the actual return of shares of PPG common stock or issuance and delivery of shares of Georgia Gulf common stock, as the case may be. The creation of a “when distributed” or “when issued” market is outside the control of PPG and Georgia Gulf. NYSE is not required to create a “when distributed” or “when issued” market, and there can be no assurances that either such market will develop or if they develop the prices at which shares will trade.

No Appraisal Rights

No appraisal rights are available to holders of PPG common stock in connection with this exchange offer or any pro rata distribution of shares of Splitco common stock.

Distribution of Any Shares of Splitco Common Stock Remaining After this Exchange Offer

All shares of Splitco common stock owned by PPG that are not exchanged in this exchange offer will be distributed on a pro rata basis to the holders of shares of PPG common stock immediately following the consummation of this exchange offer, with a record date to be announced by PPG on such date. Any PPG shareholder who validly tenders (and does not properly withdraw) shares of PPG common stock for shares of Splitco common stock in the exchange offer will waive their rights with respect to such shares to receive, and forfeit any rights to, shares of Splitco common stock distributed on a pro rata basis to PPG shareholders in the event the exchange offer is not fully subscribed.

If this exchange offer is consummated, the exchange offer agent will calculate the exact number of shares of Splitco common stock not exchanged in this exchange offer to be distributed on a pro rata basis, and that number of shares of Splitco common stock will be held in trust for holders of PPG common stock entitled thereto.

If this exchange offer is terminated by PPG without the exchange of shares, but the conditions for consummation of the Transactions have otherwise been satisfied, PPG intends to distribute all shares of Splitco

common stock owned by PPG on a pro rata basis to the holders of PPG common stock and deferred stock awards, with a record date to be announced by PPG.

Legal Limitations; Certain Matters Relating to Non-U.S. Jurisdictions

This document is not an offer to buy, sell or exchange and it is not a solicitation of an offer to buy or sell any shares of PPG common stock, shares of Georgia Gulf common stock, or shares of Splitco common stock in any jurisdiction in which the offer, sale or exchange is not permitted. Countries outside the United States generally have their own legal requirements that govern securities offerings made to persons resident in those countries and often impose stringent requirements about the form and content of offers made to the general public. None of PPG, Georgia Gulf or Splitco have taken any action under non-U.S. regulations to facilitate a public offer to exchange the shares of PPG common stock, Georgia Gulf common stock or Splitco common stock outside the United States. Accordingly, the ability of any non-U.S. person to tender shares of PPG common stock in the exchange offer will depend on whether there is an exemption available under the laws of such person’s home country that would permit the person to participate in the exchange offer without the need for PPG, Georgia Gulf or Splitco to take any action to facilitate a public offering in that country or otherwise. For example, some countries exempt transactions from the rules governing public offerings if they involve persons who meet certain eligibility requirements relating to their status as sophisticated or professional investors.

Non-U.S. shareholders should consult their advisors in considering whether they may participate in the exchange offer in accordance with the laws of their home countries and, if they do participate, whether there are any restrictions or limitations on transactions in the shares of PPG common stock, Georgia Gulf common stock or Splitco common stock that may apply in their home countries. None of PPG, Georgia Gulf or Splitco can provide any assurance about whether such limitations may exist. See “This Exchange Offer—Certain Matters Relating to Non-U.S. Jurisdictions” for additional information about limitations on the exchange offer outside the United States.

Risk Factors

In deciding whether to tender your shares of PPG common stock in this exchange offer, you should carefully consider the matters described in the section “Risk Factors,” as well as other information included in this document and the other documents to which you have been referred.

Debt Financing

In connection with the entry into the Merger Agreement, PPG and Georgia Gulf entered into certain commitment letters with other parties thereto pursuant to which those parties agreed to provide various financing in connection with the Transactions. The terms of the debt financing, including any conditions thereto and covenants thereunder, will be set out in various definitive documentation to be entered into by the respective parties. See “Debt Financing”.

Board of Directors and Management of Georgia Gulf Following the Transactions

Following the consummation of the exchange offer, Merger Sub will merge with and into Splitco, whereby the separate corporate existence of Merger Sub will cease and Splitco will continue as the surviving company and a wholly owned subsidiary of Georgia Gulf. In connection with the Merger, Georgia Gulf will increase the size of its board of directors by three members, and three individuals selected by PPG and approved by the Nominating and Governance Committee of the board of directors of Georgia Gulf will be appointed to fill the vacancies. In accordance with the Merger Agreement, these individuals will also be nominated for re-election to the board of directors of Georgia Gulf at Georgia Gulf’s 2013 annual meeting of stockholders. The executive officers of Georgia Gulf immediately prior to the consummation of the Merger are expected to be the executive officers of Georgia Gulf immediately following the consummation of the Merger.

Georgia Gulf Stockholder Vote

Georgia Gulf cannot complete the Transactions unless the proposal relating to the issuance of shares of Georgia Gulf common stock in the Merger is approved by the affirmative vote of a majority of the shares of Georgia Gulf common stock represented and voting at the special meeting, either in person or by proxy (provided that the total votes cast on the proposal represent over 50% in interest of all shares entitled to vote on the proposal).

Accounting Treatment and Considerations

ASC 805, Business Combinations, requires the use of the acquisition method of accounting for business combinations. In applying the acquisition method, it is necessary to identify both the accounting acquiree and the accounting acquiror. In a business combination effected through an exchange of equity interests, such as the Merger, the entity that issues the interests (Georgia Gulf in this case) is generally the acquiring entity. In identifying the acquiring entity in a combination effected through an exchange of equity interests, however, all pertinent facts and circumstances must be considered, including the following:

Georgia Gulf’s management has determined that Georgia Gulf will be the accounting acquiror in the Merger based on the facts and circumstances outlined above and the detailed analysis of the relevant GAAP guidance. Consequently, Georgia Gulf will apply acquisition accounting to the assets acquired and liabilities assumed of Splitco upon consummation of the Merger. Upon consummation of the Merger, the historical financial statements will reflect only the operations and financial condition of Georgia Gulf.

Material U.S. Federal Income Tax Consequences of the Distribution and the Merger

The consummation of the Distribution (which includes this exchange offer) and related transactions is conditioned upon the receipt of the Private Letter Ruling (as defined below under the heading “The Transactions—Material U.S. Federal Income Tax Consequences of the Distribution and the Merger—The Distribution”) (which has been obtained) and the Distribution Tax Opinion (as defined below under the heading “This Exchange Offer—Material U.S. Federal Income Tax Consequences of the Distribution and the Merger—The Distribution”). On the basis that the Distribution, together with certain related transactions, qualifies as a “reorganization” for U.S. federal income tax purposes under Sections 355 and 368(a)(1)(D) of the Code, in general, for U.S. federal income tax purposes, no gain or loss will be recognized by, and no amount will be included in the income of, U.S. holders of PPG common stock upon the receipt of Splitco common stock in this exchange offer or in any pro rata distribution of Splitco common stock distributed to holders of PPG common stock if this exchange offer is undersubscribed (or if PPG determines not to consummate the exchange offer).

The consummation of the Merger is conditioned upon the receipt of the Private Letter Ruling (which has been obtained) and the Distribution Tax Opinion described above, as well as the Merger Tax Opinions (as defined below under the heading “This Exchange Offer—Material U.S. Federal Income Tax Consequences of the Distribution and the Merger—The Merger”). On the basis that the Merger qualifies as a “reorganization” within the meaning of Section 368(a) of the Code, in general, for U.S. federal income tax purposes, no gain or loss will be recognized by, and no amount will be included in the income of, U.S. holders of Splitco common stock upon the receipt of shares of Georgia Gulf common stock in the Merger, except for any gain or loss recognized with respect to cash received in lieu of a fractional share of Georgia Gulf common stock.

Although a Private Letter Ruling from the IRS generally is binding on the IRS, PPG and Splitco will not be able to rely on the ruling if the factual representations made to the IRS in connection with the private letter ruling request are untrue or incomplete in any material respect, or if undertakings made to the IRS in connection with the request for the Private Letter Ruling have been violated. If the Distribution and/or the Merger fails to qualify for tax–free treatment, PPG and/or its shareholders will be subject to tax. See “Risk Factors—Risks Related to the Transactions—If the Distribution, including the Debt Exchange, does not qualify as a tax-free transaction under Section 368(a)(1)(D) or 355 of the Code or the Merger does not qualify as a tax-free “reorganization” under section 368(a) of the Code, including as a result of actions taken in connection with the Distribution or the Merger or as a result of subsequent acquisitions of shares of PPG, Georgia Gulf or Splitco stock, then PPG and/or PPG shareholders may be required to pay substantial U.S. federal income taxes, and in certain circumstances and subject to certain conditions, Splitco and Georgia Gulf may be required to indemnify PPG for any such tax liability.”

Tax matters are complicated and the tax consequences of the Transactions to you will depend on the facts of your own situation. You should read the summary in the section of this document entitled “This Exchange Offer—Material U.S. Federal Income Tax Consequences of the Distribution and the Merger” and consult your own tax advisor for a full understanding of the tax consequences to you of the Transactions.

SUMMARY HISTORICAL AND PRO FORMA FINANCIAL DATA

The following summary combined financial data of the PPG Chlor-alkali and Derivatives Business and summary consolidated financial data of PPG and Georgia Gulf are being provided to help you in your analysis of the financial aspects of the Transactions. You should read this information in conjunction with the financial information included elsewhere and incorporated by reference into this document. See “Where You Can Find More Information; Incorporation by Reference,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations for the PPG Chlor-alkali and Derivatives Business,” “Information on the PPG Chlor-alkali and Derivatives Business,” “Information on PPG,” “Information on Georgia Gulf,” and “Selected Historical and Pro Forma Financial Data.”

Summary Historical Combined Financial Data of the PPG Chlor-alkali and Derivatives Business

The following summary historical combined financial data of the PPG Chlor-alkali and Derivatives Business for the years ended December 31, 2011, December 31, 2010 and December 31, 2009 and as of December 31, 2011 and December 31, 2010 has been derived from the audited combined financial statements of the PPG Chlor-alkali and Derivatives Business. The following summary historical condensed combined financial data of the PPG Chlor-alkali and Derivatives Business for the nine-month periods ended September 30, 2012 and September 30, 2011, and as of September 30, 2012, September 30, 2011 and December 31, 2009, has been derived from the unaudited condensed combined financial statements of the PPG Chlor-alkali and Derivatives Business, but is not necessarily indicative of the results or the financial condition to be expected for the remainder of the year or any future date or period. The management of the PPG Chlor-alkali and Derivatives Business believes that the unaudited condensed combined financial statements reflect all normal and recurring adjustments necessary for a fair presentation of the results as of and for the interim periods presented. This information is only a summary and should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations for the PPG Chlor-alkali and Derivatives Business” and the financial statements of the PPG Chlor-alkali and Derivatives Business and the notes thereto included elsewhere in this document.

Summary Historical Consolidated Financial Data of PPG

The following summary historical consolidated financial data of PPG as of and for each of the fiscal years in the three-year period ended December 31, 2011 has been derived from the audited consolidated financial statements of PPG incorporated by reference in this document (except for the balance sheet financial data as of December 31, 2009, which is not incorporated by reference in this document). The following summary historical condensed consolidated financial data of PPG as of and for each of the nine-month periods ended September 30, 2012 and September 30, 2011 has been derived from the unaudited condensed consolidated financial statements of PPG incorporated by reference in this document but is not necessarily indicative of the results or financial condition to be expected for the remainder of the year or any future period. PPG’s management believes that the unaudited condensed consolidated financial data reflects all normal and recurring adjustments necessary for a fair presentation of the data for the interim periods presented. This information is only a summary and should be read in conjunction with the financial statements of PPG and the notes thereto and the “Management’s Discussion and Analysis of Financial Condition and Results of Operation” section contained in PPG’s annual report on Form 10-K for the year ended December 31, 2011 and quarterly report on Form 10-Q for the quarter ended September 30, 2012, each of which is incorporated by reference into this document. See “Where You Can Find More Information; Incorporation By Reference.”