G-3 Sheet

G-3 Glass Phenolic is an amber/brown material with a glass fabric reinforcement in a phenolic resin binder.  G-3 is probably the strongest overall laminate with excellent tensile, compressive, impact, and flexural strength at elevated temperature. 

G-3:  Mil-I-24768/18, Type GPG

Typical applications include aerospace seals and gaskets, acid resistant gaskets, oven internals, and other structural parts.