Gaskets are materials used to seal one compartment of a device ...

XXIX. ROOF COATINGS AND CEMENTS
A. Product Description
Roof coatings and roofing cements together accounted for 90 percent of the
asbestos containing adhesives, sealants, and coatings produced in the United
States in 1985. Other more specialized asbestos containing compounds used by
the construction, automobile, and aerospace industries accounted for the
remaining 10 percent. They are discussed separately under the Non-Roofing
Adhesives, Sealants, and Coatings category.
Roof coatings are cold-applied liquids which may be brushed or sprayed on
roofs or foundations to perform a variety of functions such as waterproofing,
weather resistance, and surface rejuvenation. Asphalt based, thinned with
solvents, and bodied with 5 to 10 percent asbestos fiber, roof coatings are
applied to most types of roofs except the typical shingled roof. Commercial
and industrial structures such as stores, shopping centers, and office and
apartment buildings are common users. Usually black, these coatings may be
pigmented with aluminum paste
to create a silver coating with high heat
reflectance (ICF 1986; Krusell and Cogley 1982).
Roofing cements are more viscous roof coatings. Usually consisting of
solvent thinned asphalt and bodied with 15 to 20 percent asbestos, roofing
cements are trowel-applied with the consistency of a soft paste. Applied to
all types of roofs, they are used to repair and patch roofs, seal around
projections such as chimneys and vent pipes, and bond horizontal and vertical
surfaces (ICF 1986; Krusell and Cogley 1982).
Asbestos is used in roofing compounds for its unique combination of
strength, viscosity control, and price. The important attributes of asbestos
fiber for this application are: (ICF 1986, Krusell and Cogley 1982):
a asphalt reinforcement to prevent cracking due to factors such as
temperature change;
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