H ExtremeHeat™ is designed to allow repairs on iron, steel, and metal in high-temperature environments (1000°F / 537°C). When fully cured, this metallic compound can be drilled, machined, or sanded. It is ideal for repairing cracks, small gaps, seam connections, or holes in exhaust manifolds, pipe connections, mufflers, catalytic converters, outdoor grills, fireboxes, gas and commercial furnaces, and water heaters. This product is water-based, non-flammable, and contains no solvents or volatile organic compounds (VOCs).