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Loctite 515 Anaerobic Flange Sealant, 50ml Tube

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Brand: Loctite Products

Loctite® 515™ Gasket Eliminator® Flange Sealant creates a flexible, formed-in-place gasket. Recommended for use on machined, rigid metal flanges without defects. Seals up to 0.015" gap to eliminate the need for paper, rubber, or cork gaskets. OEM approved and specified (use in applications where 515™ or "anaerobic gasket" are specified). Not recommended for use on plastics. 50 ml tube.

Loctite® 515 vs RTV Silicone
Comparison Loctite® 515 RTV Silicones
Benefits Long working time,
fast cure time
High gap filling,
high temperature range
Limitations Limited filling,
low temperature range
Short working time,
long cure time
Cure Method Anaerobic
(cures when deprived of oxygen)
(Room Temperature Vulcanizing)
Full Cure Time* 24 to 72 hours* 1 to 7 days
Gap Fill* 0.001" to 0.015" 0.001" to 0.125"
-40°F to +300°F -60°F to +400°F

*Without primer. Preparing surfaces with Loctite® 7649 Primer N (Part No. LT-21348, sold separately) can cut the cure time of Loctite® 515 to about 2 hours and increase the gap filling ability to 0.050".

Note: Due to import restrictions, we are not able to ship this product to Mexico.

Part No.
Stock Status

Condition: New

In Stock
Related Product Groups
Loctite Products