U.S. Spray Foam Customers Set to Benefit from BaySystems™ and Construction Polymers International Agreement

Pittsburgh, May 26, 2009 — Bayer MaterialScience LLC announced today an agreement between its BaySystems™ polyurethane systems business and Construction Polymers International (CPi), a leading provider of spray foam equipment and turnkey systems, under which CPi will offer parts, equipment, spray foam rigs, and related technical support for BaySystems™ spray polyurethane foam (SPF) customers in the U.S.

For BaySystems™ SPF customers, the agreement translates into a one-stop shop for their equipment and service needs. These customers will be able to realize faster and more efficient parts delivery and support – with no interruption in service – and also have the added convenience of being able to turn to CPi for their standardized and custom-built spray foam rig needs. It is the first time BaySystems™ has been able to offer this type of service to its SPF customers.

The arrangement leverages the strengths of both organizations, according to Renee Zierden, general manager of the BaySystems™ SPF business in the U.S. “We will continue to do what we do best; producing customized solutions based on our proven polyurethane experience,” she explained. “At the same time, our customers will have access to equipment from CPi, a leading supplier in the spray foam equipment and services market. Simply put, this gives our customers the best of both worlds.”

Jack DeMita, CPi chief operating officer, said, “This agreement offers great synergy and enables both CPi and the BaySystems™ SPF business to concentrate on our core expertise. We are proud to be affiliated with Bayer MaterialScience LLC and look forward to providing its customers with exceptional service and support.” DeMita added that CPi has recently opened a facility in Phoenix to better serve local BaySystems™ customers.

About CPi
CPi, the number-one authorized Graco distributor for spray foam equipment worldwide, has convenient locations across the country. In addition to its headquarters location in North Canton, Ohio, CPi also operates full-service centers in Harvey, La., and Berlin, Conn., as well as a new location in Phoenix. More information about CPi is available at www.cpifoam.com.

About BaySystems™
BaySystems™ is the global polyurethane systems business of Bayer MaterialScience. More information can be found at www.baysystemsspray.com.

About Bayer MaterialScience LLC
Bayer MaterialScience LLC is one of the leading producers of polymers and high-performance plastics in North America and is part of the global Bayer MaterialScience business with nearly 15,100 employees at 30 sites around the world and 2008 sales of 9.7 billion euros. Business activities are focused on the manufacture of high-tech polymer materials and the development of innovative solutions for products used in many areas of daily life. The main segments served are the automotive, electrical and electronics, construction, medical, and sports and leisure industries.

About Bayer Corporation
Bayer Corporation, headquartered in Pittsburgh, is a subsidiary of Bayer AG, an international health care, nutrition and high-tech materials group based in Leverkusen, Germany. In North America, Bayer had 2008 net sales of approximately 8 billion euros (about $12 billion) and employed 17,000 at year end. Bayer’s three subgroups, Bayer HealthCare, Bayer CropScience and Bayer MaterialScience, improve people’s lives through a broad range of essential products that help diagnose, prevent and treat diseases; protect crops and enhance yields; and advance automobile safety and durability. For more information, go to www.bayerus.com.

Contact:
Sean Kelly, Phone: 412-777-5200
E-mail: sean.kelly@bayerbms.com

For more information about Bayer MaterialScience, call 1-800-662-2927, e-mail naftainfo@bayerbms.com or visit www.bayermaterialsciencenafta.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.