LOCTITE 518 Gasket Sealant

(Known as Loctite 518 Gasket Eliminator Flange Sealant )

*some package sizes excluded

Recently Improved - LOCTITE 518 has better cure on contaminated surfaces, increased flexibility and adhesion and improved cure on inactive metals such as aluminum.

LOCTITE® 518™ Gasket Sealant is a medium-strength gasket sealant which cures when confined in the absence of air between close-fitting metal surfaces. It is an anaerobic gasketing material designed for use on rigid iron, aluminum, and steel flanged mating surfaces. Seals up to 300°F, fills gaps up to 0.05" and forms a flexible, chemical-resistant seal that will not tear or decay. Parts disassemble easily, even after extended service.

Typical applications include sealing close-fitting joints between rigid metal faces and flanges. It is also used as a form-in-place gasket on rigid flanged connections, e.g. transmissions, gear box, and engine casings.

Our improved formula provides these additional properties:
• Medium-strength, flexible anaerobic flange gasket
• For active and inactive rigid metal flanges
• Cures through minor surface contamination
• Adapts to flange surface irregularities and  gaps up to 0.25 mm
• Gel-type consistency
• Seals instantly against low pressure

Your benefits

• Reduces inventory costs – no need for large inventory of cut gaskets
• Resists high pressure when fully cured
• No compression set or misaligned gaskets
• Easy to automate
• Eliminates manual assembly of conventional gaskets, reduces process costs

Technical Data Sheets (TDS)

Loctite 518 (Loctite 518)

Product information

IDH# Item Name Size
Case Quantity
Safety Data Sheets
231611 22423 LOCTITE 518 Flange Sealant
25 ml tube
5 / case
231613 22424 LOCTITE 518 Flange Sealant
300 ml  
10 / case
209759 51817 LOCTITE 518 Flange Sealant
6 ml tube
12 / case
135481 51831 LOCTITE 518 Flange Sealant
50 ml tube
10 / case
135482 51845 LOCTITE 518 Flange Sealant
300 ml cartridge
10 / case