3M 912 Bondo Hardener Liquid Fiber Gloss 0.37 Ounce

Fiberglass resin hardeners liquid -.37 ounce For use with bondo polyester fiberglass resin and other resins requiring liquid hardener. Can be used with tape, cloth or mat. Use tape for minor repairs, cloth on contour surfaces where thickness is less important, mat on areas where extra strength is required.