Fiberglass reinforced sheets are combustible. Fire precautions similar to those
appropriate for wood-based products should be observed.
Fiberglass-reinforced
acrylic classifies as a CC 2 material, which means that it exhibits a burning rate
of less than 2-1/2-inches per minute when tested by the ASTM D-635 method.
Frost-SOS
and White 1000-SOS are available in a type FR (fire-retardant) that classifies as
a CC 1 material in .090" and thicker gauges, which means that the material stops
burning when tested by the ASTM D-635 method.
Type
FR panels also fall into a Class C category (NFPA 255) in some thicknesses, which
means that they exhibit flame spread and smoke density values within specific ranges
when tested by the ASTM E-84 method. Additional information regarding burning characteristics
can be supplied upon request.
Note that no fire-retardant version of the Crystal II
or embedment varieties is available.