PERMATEX Form a Gasket #1 Sealant Fast Drying 85g Tube PX80008 PERMATEX Form a Gasket #1 Sealant Fast Drying 85g Tube PX80008 Permatex Form-A-Gasket No. 1 Sealant is a fast drying, hard setting sealant designed for sealing rigid materials and flanges, or patching holes and joints where permanent assembly is desired.