Liquid White Glues by Elmer's. Details: Elmer’s epoxy repair system, 2-Port, all-purpose, 12 oz capacity, for fix holes, cracks and gaps on wood, metal, fiberglass, concrete and repairs on fiberglass, metal, concrete and aluminum. Fiberglass repair provides a simple, cost-effective way to repair holes, cracks and gaps on wood, metal, fiberglass, concrete and more. To use, mix one part resin to one part hardener. Adhesives and sealants have been Elmer's specialty. Our packages and products have been a familiar sight in workshops and craft rooms across the country for 60 years.