Black Swan's Iron Paste is a multi-purpose compound that is ideal for sealing soil joints, repairing cracks or leaks, and in joining similar or dissimilar materials together. Iron Paste is a ready-to-use formula and can be used directly from the can. It goes on like putty and hardens like steel. After hardening it can be filed, drilled, sanded and even painted. It will not shrink or crack even years later. Iron Paste can be used on pipe, sinks, boilers, radiators, bathroom fixtures, valves, tile, drain gutters, automobile bumpers and bodies, boats, appliances and much more. It adheres to tile, glass, porcelain, vitreous china and all metals. Iron Paste withstands temperatures up to 400 degrees F and also withstands pressure up to 60 lbs. on water, oil, steam or gas lines.