J-B Weld Extreme Heat High Temperature Resistant Metallic Paste is formulated to allow for repairs to iron, steel and metal in high temperature environments (2400 Degrees F/1300 Degrees C). When cured, this metallic compound can be drilled, machined or sanded. It is great for repairing cracks, small gaps, seam connections or holes in exhaust manifolds, pipe connections, mufflers, catalytic converters, outdoor grills, gas and commercial furnaces and water heaters. This product is non-flammable an