Document dbRZMRgMyymLr3dm03KE55y5

SECTION 6 PAINTS, COATINGS, AND SEALANTS Asbestos Is used In asphalt and tar bases for products such as roof sealants, waterproof coatings, and autonobile undercoatings. Previous use6 of asbestos in texture paints, spackle, and joint compounds have been banned. The asbestos fiber serves as a filler and reinforcing agent in these diverse products. An acceptable substitute nust be: i.'oncombustlble e Resistant to decay, many acids, andvermin Made up of long, flexible fibers a Strong enough to reinforce other binders a Unaffected by temperatures up to 500C (automobile undercoating) Un.u effective There are no substitutesavailable thatpossess all the above attributes, but for applications where several of the characteristics are not necessary, a substitute may be applicable. There are r.o commercially available esbescos-free, asphalt-based roofing, underrating, cr linings and chemical resistant coatings products that provide the properties of asphalt-based products. However, several companies report the availability of products in the premarket or early commercial stages. 26,27 nonasphalt asbestos-based linings and chemically resistant coatings, several mineral reinforcing materials are available as substitutes for asbestos. Although use of asbestos in texture paints was banned in 1977, no substitutes of comparable quality have been found. For Table 6 presents a cost comparison for substitute materials used in sealant products. TABLE 8. COST C>' SUBSTITUTE MATERIALS COMPARED WITH GRADE 7 CKRYS07ILE 22 Substitute Cost ($/pound) Chrysotile Fiberglass Polypropylene Cellulose Cotton Talc 0.06-0.12 0.40-0.50 0.35 0.60 0.20 0.06 Substitute Barite Diatomlte Silica Clay Mica Carbonate Nylon Cost ($/pound) - 0.04-0.08 0.05 0.04-0.08 0.60 10 8005 1099 PRODUCED BY FORD