• Best known for its bridging capabilities in rebuilding shattered fiberglass and for reinforcing torn or rusted areas of sheet metal. • Formulated with long strands of chopped fiberglass. • Double the strength of standard fillers • Waterproof/Rustproof. • Can be used with or without fiberglass cloth or mat. • Should be finished with Rage and/or Metal Glaze. • Blue cream hardener included.