All grades of Polyply industrial sheet are produced using polyester
resin and fiberglass reinforcement. They are U.L. recognized and are
available in 36"x72" and 48"x96" sheet. Sheets are manufactured in
thicknesses ranging from 1/32" to 2" with most sizes in stock for
Polyply L-40. Low cost, general purpose flame retardant electrical
laminate which meets or exceeds NEMA GPO-2 requirements.
Polyply L-50. Track resistant, flame retardant laminate which meets
or exceeds NEMA GPO-3 requirements.