Spray 'N' Seal Leak Repair seals in minutes Permatex, Inc.'s Spray 'N' Seal Leak Repair was designed to seal low-pressure leaks in minutes without the need for disassembling or removing parts. It applies as an aerosol and is easy to use in hard-to-reach places. Applications include hoses, oil pans, differentials, transmission pans, thermostat housings, water pumps, valve covers, tubing connections, electrical harness connectors, plastics, PVC, and canvas. It also replaces liquid additive sealers that can swell and foul internal seals.