Sheffield, MA –March 25, 2005–Sheffield Plastics, Inc., a Bayer MaterialScience Company, has released a new 8-page color brochure describing their full line of polycarbonate sheet and film products for the toughest outdoor sign applications. Sheffield's MAKROLON® sign products are produced exclusively with MAKROLON polycarbonate resin from Bayer Corporation.

The new brochure features MAKROLON SL enhanced UV-resistant polycarbonate sheet with exceptional weatherability and superior impact strength. MAKROLON SL meets stringent UL Section 48 criteria for use in electric signs. Also covered are MAKROLON® AR Polycarbonate Sheet for abrasion resistance, VIVAK HT™ Sheet, a proprietary, high performance thermoplastic sheet with enhanced UV resistance, exceptional formability and outstanding impact strength, and Makrofol® EPC (Extended Performance Composite), an enhanced performance composite film with a velvet first surface and a matte second surface, offering excellent durability, weatherability, and chemical resistance.

A detailed chart delineates the physical, optical, mechanical, thermal and flammability properties of MAKROLON, and another chart details available sizes, colors and surface textures. Thermoforming guidelines and information on material preparation, machining and decorating is also provided in the brochure.

The new brochure is available free to all interested parties. For the brochure or more information, call 1-800-254-1707, Fax: 1-800-457-3553, visit www.sheffieldplastics.com, or write Sheffield Plastics Inc., 119 Salisbury Road, Sheffield, MA 01257.

This news release contains forward-looking statements based on current assumptions and forecasts made by Bayer Group management. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of the company and the estimates given here. These factors include those discussed in our public reports filed with the Frankfurt Stock Exchange and with the U.S. Securities and Exchange Commission (including our Form 20-F). The company assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.

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