ALL-NEW MAKROLON® 15 POLYCARBONATE GLASS REPLACEMENT FEATURES OUTSTANDING WEATHERABILITY WITH 15-YEAR WARRANTY MAKROLON 15 pairs outstanding impact resistance and excellent weatherability, making it an ideal glass replacement solution. Download the Hi-Res versionof this image. Sheffield, MA—May 16, 2008—New MAKROLON® 15 Polycarbonate Sheet, a glass replacement product from Sheffield Plastics, a Bayer MaterialScience Company, offers exceptional weatherability with significantly increased protection against tough environmental conditions and long-term UV exposure. MAKROLON 15 sheet is lighter than glass and features excellent insulation properties, making it a practical and cost-effective solution for architectural, security, and many additional applications. MAKROLON 15 sheet also demonstrates outstanding abrasion resistance, superior to other coated polycarbonate sheet products. Plus, MAKROLON 15 sheet ensures product endurance with a 15-year limited warranty covering breakage, yellowing and coating integrity. MAKROLON 15 sheet is a robust new addition to Sheffield Plastics’ extensive line of high-quality polycarbonate glass replacement products. With its outstanding weatherability and thermal resistance, MAKROLON 15 sheet is an ideal solution for outdoor and indoor architectural glazing applications. It also offers excellent impact resistance for security and government or educational facility applications. In addition, MAKROLON 15 sheet is easy to cut and fabricate, and its lightweight composition makes it simpler and safer to install than glass alternatives. With a surface hardness comparable to glass and exceptional light transmission, MAKROLON 15 sheet easily replaces glass or acrylic in architectural applications. Also, MAKROLON 15 sheet utilizes new state-of-the-art technology to achieve weatherability unparalleled among competitive polycarbonate sheet products. Along with proven impact resistance, MAKROLON 15 sheet demonstrates increased protection against hazing, yellowing, abrasion and rippling, resulting in sustained optical clarity and less distortion over time. Along with increased protection capabilities, MAKROLON 15 sheet saves time and money in many applications. Its excellent insulation capabilities conserve energy and may significantly reduce heating and cooling costs. Additionally, MAKROLON 15 sheet features stronger composition that virtually eliminates the need for early replacement, cutting labor costs. Plus, unlike glass, MAKROLON 15 sheet features easy fabrication that allows for on-site construction with standard tools, providing a convenient, flexible solution to fit a variety of architectural needs. As part of the fastest growing brand of polycarbonate sheet in the world, MAKROLON 15 sheet offers a superior solution for a wide range of industrial and commercial applications. With enhanced weatherability and impact resistance, along with exceptional optical clarity and an extensive 15-year performance warranty, MAKROLON 15 sheet provides an outstanding glass replacement solution for years to come. Sheffield Plastics Inc., a Bayer MaterialScience Company, is a global leader in high performance plastics. Sheffield continues its leadership in polycarbonate technology with new processes, product innovations and superior optics. For more information, contact Sheffield Plastics Inc. at 1-800-254-1707; fax 1-800-457-3553; write 119 Salisbury Road, Sheffield, MA 01257; or visit www.sheffieldplastics.com. 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 annual and interim reports filed with the Frankfurt Stock Exchange. The company assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.