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PLAINTIFF'S EXHIBIT BIR-S7 January 10, 1983 KKI'l.Y TO: FAST WAI.I'OI.K. MA u2<i:rj Fete Esslinger Hercules Incorporated Bedford Executive Office Park Building 1 Bedford, New Hampshire 03102 Dear Pete: - As agreed on in our meeting on January 7, 1983, listed below are our cement formulas. All ingredients are in percent by weight. SPECIAL FLASHING CEMENT Asphalt (approx. Kerosene Naphtha Asbestos 6D Asbestos 7R 135F S.P.) PLASTIC CEMENT Asphalt (approx. Naphtha Asbestos 7R Talc #36Kerosene 135F S.P.) BUILT-UP COLD APPLICATION ADHESIVE (BUCA) Asphalt (approx. 175F S.P.) Naphtha Asbestos 7R 51% 37% 12% FIBERED ROOF COATING Asphalt (approx. 135F S.P.) Naphtha Asbestos 7R 50% 38% 12% 001229 January 10, 1983 Page 2 REFLECT0-C0AT ALUMINUM ROOF COATING Naphtha Asphalt (approx. 175F S.P.) A1 Paste - Alcoa #231 Asbestos - PI -1 or HB 387. 287 20/ 147 The other two products are seldom produced, but your technical people may be able to suggest formulas based on work with the frequently produced materials. LAP CEMENT Asphalt (approx. Kerosene Naphtha Asbestos 7R 135FS.P.) 65% 22% 7.57 5.5% QUICK SETTING LAP CEMENT Asphalt (approx. Rock Dust Kerosene Naphtha Asbestos 7R 210F S.P.) ' 42% 29% 12% 12% 5% As mentioned by Jim Jackson, we are looking for a physical property equivalent at the lowest possible raw material cost. If your technical people wish samples of #36 Talc or our Rock Dust for possible addition to the formulas, please let me know. Also; if.you find any southern asphalt cement manufacturers using Pulpex, please let Jim Jackson know. Enclosed is a copy of the memo to Shreveport asking them to send a 5 gallon blank and 1 gallon finished sample of each product to: Mr. Ed Engle Hercules, Inc. Research Center Wilmington,, Celaware 19899 001230 January 10, 1983 Page 3 When they feel an equivalent formula has been reached, we would like to evaluate a sample and formula costs before proceeding to a mill trial. Please do not hesitate to call if there are any questions. Sincerely yours, BIRD & SON, INC. vern Koeiois Chemist cc: Mr. Jackson - BBH bcc: Mr. Wood - BBP Mr. Mai oof - BBP Mr. Suva - BR Mr. Colvin - FS Note bcc: This is in reference to replacing asbestos in our cements at Shreveport. 001231