CertainTeed Corporation, a wholly owned subsidiary of Compagnie de Saint-Gobain (Paris, France), today sent the following letter to the Board of Directors of Brunswick Technologies, Inc. (Nasdaq: BTIC): May 8, 2000 An Open Letter to the Directors of Brunswick Technologies, Inc. Dear Brunswick Technologies Director: You have stated publicly on a number of occasions that your fiduciary duty requires you to consider the effect of our offer on your corporate constituencies in addition to the shareholders.