Cabot Ceases Manufacturing Operations in Waverly, West Virginia

BOSTON, April 7, 2008 /PRNewswire-FirstCall/ -- Cabot Corporation NYSE: CBT announced today that its Waverly, West Virginia carbon black plant ceased manufacturing operations as of March 31, 2008. As announced in its June 12, 2007 press release, Cabot's decision to close this plant is due to changes in the tire manufacturing industry.

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Tire manufacturing has undergone significant restructuring over the past 24 months, as a result of tire capacity reductions throughout North America and the expansion of tire manufacturing facilities in China and other countries in the Asia Pacific and South America regions. These changes, as well as the projected growth of imported tires to the United States, made it necessary for Cabot to reduce its carbon black capacity in North America. Cabot will continue to fulfill its customers' supply needs.

Cabot Corporation is a global specialty chemicals and materials company and is headquartered in Boston, MA. Cabot's major products are carbon black, fumed silica, inkjet colorants, and capacitor materials. Cabot employs approximately 4500 people in 45 manufacturing plants around the world.

    Contact:
    Ethel Shepard
    Corporate Affairs Manager
    617-342-6254
    ethel_shepard@cabot-corp.com

    Susannah Robinson
    Director, Investor Relations
    617-342-6129