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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".

Part No.
Stock Status
In Stock
Related Product Groups
Loctite Products


by PowerReviews
Loctite 515 Anaerobic Flange Sealant, 50ml Tube

(based on 1 review)

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Reviewed by 1 customer

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Product received as advertised and delivered promptly

By Lloyd

from Tampa, FL

Verified Buyer

Comments about Loctite 515 Anaerobic Flange Sealant, 50ml Tube:

Used on Lycoming engine casing joints. Product was easy to apply

Service and delivery comments:

Product delivered as advertised and promptly after ordering.

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