Features and Benefits

LOCTITE 518 is a medium-strength, general purpose gasketing product with excellent contamination tolerance. Ideal for use on casted iron, steel and aluminum flanges.
LOCTITE® 518 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. LOCTITE 518 fills gaps up to 0.25mm 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 formed-in-place gasket on rigid flanged connections, e.g. transmissions and motor housings.
  • Semi-flexible, medium-strength anaerobic flange gasket
  • Easy to automate
  • Reduces process costs – eliminates manual assembly of conventional gaskets
  • NSF P1 Reg. No. 123758
  • 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
  • Reduces inventory costs – no need for large inventory of cut gaskets
  • Resists high pressure when fully cured
  • No compression set or misaligned gaskets
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Related Products

LOCTITE 518 is similar to LOCTITE 510
LOCTITE 518 is similar to LOCTITE 574

Technical Information

Color Red
Cure Schedule Temperature (Step 1) 200
Cure Schedule Temperature Unit (Step 1) °C
Fixture Time 25 min.
Fixture Time Temperature 25 °C
Full Cure Temperature 25 °C
Shelf Life Temperature -40 °C
Specific Gravity 1.1
Specific Gravity Temperature 25 °C
Substrates Metal: Aluminum
Temperature -55 - 150 °C
Tensile Shear Strength 7.5 N/mm²
Viscosity 500000 - 1000000 mPa.s (cP) Brookfield
Viscosity Temperature 77 °F