Gorilla Hair® and Claw Glas® are fiberglass-reinforced fillers, which possess the necessary properties to cover holes in metal and fiberglass parts. These fiberglass products are waterproof, providing a barrier on which to build up finishing layers of body fillers. When used in conjunction with reinforcing materials (fiberglass cloth or mat), large, open areas can be covered without welding or riveting in metal sections. Gorilla Hair® provides a long fiberglass reinforcement as well as increased viscosity for use where the hole is 2” or larger. It stays put in very thick applications and it can be forced into cracks and crevices, around edges or lips of any surface to make a superior bond. Gorilla Hair® provides an excellent waterproof base on which to apply addition layers of body filler. Claw Glas® should always be used to cover dent puller holes since body filler can absorb water and cause lack of adhesion under the repaired area. Claw Glas® can be used with or without additional reinforcement on area where the opening is 11½” in size. Both products use red cream hardener. The part numbers for Gorilla Hair® is 502100 for a full quart and 502200 for full gallon. The Claw Glas® parts numbers are 501100 for full quart and 501200 for Full Gallon.