Rockwood Holdings, Inc. (NYSE: ROC) today announced that its wholly-owned subsidiary Rockwood Specialties Group, Inc. (RSGI) will offer $750.0 million aggregate principal amount of senior notes due 2020. The notes will be fully and unconditionally guaranteed on a senior unsecured basis by Rockwood Holdings and each of RSGI’s existing and future domestic subsidiaries that is a guarantor under RSGI’s senior secured credit facilities. Rockwood will use the net proceeds from the sale of the notes for general corporate purposes, which may include, among other things, strategic investments and acquisitions, capital expenditures and repayment of debt. Deutsche Bank Securities, Citigroup, Morgan Stanley and UBS Investment Bank are serving as joint book-running managers for the offering, with KKR and Lazard Capital Markets acting as co-managers. The notes are being offered pursuant to an automatically effective registration statement filed with the Securities and Exchange Commission. A preliminary prospectus supplement relating to the offering has been filed with the Securities and Exchange Commission. This news release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of these securities in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state. Copies of the preliminary prospectus supplement and accompanying prospectus may be obtained by contacting the joint book-running managers at: Deutsche Bank SecuritiesEmail: prospectus.CPDG@db.comToll Free: 800-503-4611 CitigroupAttention: Prospectus DepartmentBrooklyn Army Terminal140 58th Street, 8th Floor,Brooklyn, New York 11220Phone: (800) 831-9146 firstname.lastname@example.org Morgan StanleyToll Free: 1-866-718-1649 UBS Investment Bank299 Park AvenueNew York, New York 10171Attention: Prospectus SpecialistTelephone: 877-827-6444, ext. 561 3884 Rockwood Holdings, Inc. is a leading global specialty chemicals and advanced materials company. Rockwood has a worldwide employee base of approximately 10,000 people and annual net sales of approximately $3.7 billion. Rockwood focuses on global niche segments of the specialty chemicals, pigments and additives and advanced materials markets.