Pipe sealants prevent leaks and loosening in pipe joints due to vibration, and seal out contaminants to prevent corrosion. Pipe thread sealants have a liquid consistency that is applied directly to the threads of pipe and pipe fittings to provide a tight seal and make threading easier. Pipe thread sealant tape wraps around pipe threads prior to assembly to provide lubrication and a secure seal. Plumber's putty provides a watertight seal around faucets, sinks, and drains by filling the space between rigid, flanged surfaces. Pipe cement bonds and seals unthreaded plastic pipe.