When I detected a small leak in the gas line running to my water heater, I contacted the gas company and had a technician visit my home. The tech unscrewed a joint in the metal pipe carrying natural gas to the water heater and coated the threads with a blue substance similar to modeling clay before reattaching the pipe.
He referred to the claylike substance as pipe cement. I have been unable to locate this item in a home improvement store because pipe sealants are usually liquid or similar in texture to caulk. Does anyone know what this "clay" truly is and where to buy it?
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