Permatex 51531 Anaerobic Flange Sealant, 50 ml Tube For use on rigid machined flanges with less than .015 inch gap Original Equipment Manufacurer (OEM) approved, for use where 'anaerobic' gasket is specified Eliminates preformed, pre-cut, paper, rubber and cork gaskets Flexes with flanges that move in service Suggested Applications: Water pumps, thermostat housings, transmission pans, transmission case covers, transaxle casings, engine cases, timing covers, and o-ring replacement