Permatex Anaerobic Flange Sealant is a flexible, gasketing material for use on rigid machined flanges with less than a .015 inch gap. Designed to cure in the absence of air, this flange sealant eliminates preformed, pre-cut, paper, rubber and cork gaskets. Original Equipment Manufacurer (OEM) approved – use where OE’s specify 'anaerobic' gasket. Flexes with flanges that move in service and withstands temperatures to 300 degrees fahrenheit. Suggested applications include water pumps, thermostat housings, transmission pans, transmission case covers, transaxle casings, engine cases, timing covers, and o-ring replacement.