What is Body Filler? In general, body fillers consist of a polyester resin with a cream hardener that forms a putty-like substance that is used to return a vehicle’s body to its smooth surface after minor damage. Think of it like the spackle used in home repair to cover nails and even out walls.

Clausen: Gorilla Hair– Waterproof With Hardener

Clausen Gorilla Hair, Putty, Quart; Long Strand Fiberglass. This product is waterproof, self-etching, and tack-free with tremendous strength for reinforcing