PITTSBURGH, PA - Koppers Inc., a wholly-owned subsidiary of Koppers Holdings Inc. (NYSE: KOP), announced today that it is proposing an offering through a private placement of $400 million aggregate principal amount of senior notes due 2020 (the "Notes").

It is expected that the Notes will be guaranteed by Koppers Holdings Inc. and certain of Koppers Inc.'s domestic subsidiaries. The net proceeds of this offering are intended to be used to repurchase any and all of Koppers Inc.'s outstanding $300 million Senior Notes due 2019 (the "2019 Notes") and to pay related fees and expenses in connection with its previously announced concurrent tender offer and consent solicitation, and the redemption of any of the 2019 Notes that remain outstanding if Koppers Inc. purchases less than all of the outstanding 2019 Notes in the tender offer and consent solicitation. Any excess proceeds will be used to repay outstanding debt under Koppers Inc.'s senior secured credit facilities and for general corporate purposes.

The Notes and the related guarantees are being offered by the initial purchasers only to qualified institutional buyers in reliance on Rule 144A under the Securities Act of 1933, as amended (the "Securities Act") or, outside the United States, to persons other than "U.S. persons" in compliance with Regulation S under the Securities Act.

The Notes and the related guarantees have not been registered under the Securities Act or the securities laws of any other jurisdiction and may not be offered or sold in the United States absent registration or an applicable exemption from, or in a transaction not subject to, registration requirements. A confidential offering memorandum will be made available to eligible holders. The offering will be conducted in accordance with the terms and subject to the conditions set forth in the offering memorandum.

About Koppers

Koppers, with corporate headquarters in Pittsburgh, Pennsylvania, is an integrated global producer of carbon compounds, chemicals, and treated wood products and services for the aluminum, railroad, specialty chemical, utility, rubber, concrete, steel, residential lumber, and agriculture industries. Including our joint ventures, we serve our customers through a comprehensive global manufacturing and distribution network, with facilities located in North America, South America, Australasia, China and Europe. The stock of Koppers Holdings Inc. is publicly traded on the New York Stock Exchange under the symbol "KOP." For more information, visit us on the Web: www.koppers.com. Questions concerning investor relations should be directed to Michael J. Zugay at 412 227 2231 or Michael W. Snyder at 412 227 2131.