Travelers Asbestos Seminar Booklet (1980): Forty-Eight Insulations Product Information

Travelers' one-page data sheet for Forty-Eight Insulations, Inc. of North Aurora, Illinois, whose plant there (1923–1970) made Weber's Forty-Eight and other insulating cements and HT Block that the company said contained 1–3% chrysotile, from fiber bought from Johns-Manville, Carey Canadian Mines, Asbestos Corporation and others. Its first knowledge of hazards is given three ways (the mid-1970s, a 1969 or 1970 letter from Dr. Selikoff, and 1964 through NIMA), first labeling as mid-1970, and the sheet says the product line was dropped once the company learned of the health hazards. It names Thorpe, Plant Insulation and Western MacArthur as distributors and records the company's denial of sales to the Navy.