Versachem Titanium 5 Epoxy is a fast-setting titanium-filled epoxy that bonds similar and dissimilar metals with superior strength. Fills gaps, cracks and voids in all metals. Only mix the amount of hardener and resin together that can be used within the handling time, and always mix equal portions of the hardener and resin thoroughly together in order for this product to cure properly. Once cured, it can be drilled, tapped, machined and sanded. Bonds: Metal, Titanium, Iron, Copper, Steel, Aluminum, Stainless Steel, Brass, Pewter with a tensile strength of 2500 PSI. Not recommended for use on polypropylene or polypropylene plastics. Dark gray color, waterproof formula, with a temperature range of -60F to +200F.