SerpiMastic provides an ultra-durable, weather, UV and
chemical-resistant protective coating that provides high impact protection for
asbestos, cement asbestos board and thermal/insulations on boilers and pipes,
and other substrates that demand a ultra-durable mastic coating. Available in
two viscosity grades, sprayable and trowelable, SerpiMastic is UL classified as
a bridging encapsulant for use with classified sprayed fiber and cementitious
- High temp, water-based, high solids, high performance
- Dries to a tough, weather-resistant protective coating
that provides high temperature, high impact protection for asbestos
- Applications: Cement asbestos board and thermal/insulations
on boilers, pipes and ducts
Product Data Sheet
Safety Data SheetHow to Use
Surfaces to be protected should be free of excessive loose
dirt or oil. SerpiMastic Coating will bond tightly to virtually any surface.
For repairs of large damaged areas, weak insulation or areas requiring greater
mechanical strength apply Fiberlock Lag Kloth or Serpi Wet-Wrap ‘N’ Seal prior
Apply with trowel or brush. SerpiMastic Trowelable can be
applied using any ordinary steel mason’s trowel or similar spreading tool. For
smoother finish use a wet trowel.
SerpiMastic is supplied ready to use, thinning is not
required or recommended. SerpiMastic is a water-based coating material. Coating
application thickness, temperature and humidity will affect drying rate. Drying
time can be minimized by applying several thinner coats, with 24 hours drying
time between each coat. SerpiMastic Trowelable can be applied in a single
application up to 500 mils (12.7 mm) thick without cracking or shrinking.
18.5 ft2/gal. @ 63 dry mils
@ 70°F 50% R.H.
To Touch: 2 Hours
Completely Dry: 48 Hours
High humidity may retard drying.
Clean tools and drippings with warm soapy water before
SerpiMastic dries. Dispose of waste
according to all existing local, state and federal regulations.
Do not ingest. Do not apply to energized electrical
conductors. Always use goggles or suitable eye protection. If product is
accidentally ingested, unless contraindicated, administer two or more glasses
of water and induce vomiting. If more than trace amounts have been ingested
seek medical advice. Wash areas of skin contact with soap & water. Consult
Material Safety Data Sheet for additional information. Do not add water. Keep
lid on until ready to use. Stir thoroughly. Do not mix with any other coatings,
solvents or colors in oil. Apply on when air and surface temperature are below
40°F and 90°F. Do not apply when drying conditions are poor. Use adequate
ventilation during application. Store in a dry place at temperatures between
40°F and 90°F. Approved respirators must be used to prevent inhalation of
asbestos fibers that may be present in the air. Protective clothing should be