Loctite 234225 Anaerobic Gasket Maker 250 mL Pink

250 mL Anaerobic Gasket Maker for Metal Flanges

Loctite 234225 is a pink anaerobic gel that cures between metal surfaces to form a high-temperature gasket. It suits mechanics and engineers who need a reliable seal on rigid flanges without a pre-cut gasket. The product resists temperatures from -65 °F to 400 °F and fills gaps up to 0.01 in. Full cure is reached in 4 hours with a 25-minute working time.

Check surface condition and gap size before use

The anaerobic cure requires clean, close-fitting metal faces and the absence of air. Verify that the maximum gap does not exceed 0.01 in and that both surfaces are free of oil, old sealant or paint. The gel is formulated for metal only; it will not cure properly on plastic, rubber or large clearances. Allow 25 minutes for assembly adjustments before the material begins to set.

Tube packaging and anaerobic chemistry shape daily

The 8.45 fl oz tube dispenses a controlled bead for repeatable application on bench or line work. Because curing starts only when air is excluded, the gel stays workable in the tube and on the flange during the 25-minute open time. High-temperature resistance up to 400 °F means the sealed joint survives engine or exhaust heat cycles without re-torquing. Series 510 formulation provides consistent gap fill for rigid metal assemblies.