Marketing InformationBlack Swan®'s no-hub sealant is an amber colored, smooth flowing, semi-viscous liquid for use as a coating on black pipe to improve leak-free sealing of no-hub couplings the high-performance polymer resin compound is elastic and resists vibration and temperature change it is a fast drying sealant that cures by solvent evaporation resulting in an elastic membrane that adheres to both pipe and coupling gasket, providing a flexible adherent membrane coating gaskets on nonporous surfaces may be taken apart at anytime without injury to sealed surface. Temperature range use from -65 to 400 deg F resistant to motor oils, hydraulic fluids, water, steam, diesel fuel oils, aviation fuels, aliphatic solvents (petroleum distillates), antifreeze and gasoline.