Permatex 81860-6PK Sensor-Safe Blue RTV Silicone Gasket Maker, 7.25 oz. Automatic Tube (Pack of 6) Sold in case packs of 6 Makes reliable 'formed-in-place' gaskets that resist cracking, shrinking and migrating Coats pre-cut gaskets to increase reliability without fouling oxygen sensors Effectively replaces almost any cut gasket Suggested Applications: Valve covers, oil pans, timing covers, water pumps, thermostat housings, transmission pans