LOCTITE 518

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 aluminium 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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Documents and Downloads

Safety Data Sheets and RoHs
LOCTITE 518, 50ML 2069174 en-GB
IDH: 2069174
EAN: 5010266012162

Size Case: 50 ml Standard Cartridge

Quantity: 10.0/case

LOCTITE 518, 300ml 2069177 en-GB
IDH: 2069177
EAN: 5010266012131

Size Case: 300 ml Standard Cartridge

Quantity: 10.0/case

LOCTITE 518, 65ML 2069178 en-GB
IDH: 2069178
EAN: 5010266012063

Size Case: 65 ml Standard Cartridge

Quantity: 10.0/case

LOCTITE 518 PEN, 25ml 2392090 en-GB
IDH: 2392090
EAN: 4058093019474

Size Case: 25 ml Bottle

Quantity: 12.0/case

No documents found

Technical Information

Colour Red
Fixture Time 25.0 min.
Lab Shear Strength 7.5 N/mm²
Specific Gravity, @ 25.0 °C 1.1
Storage Temperature 8.0 - 21.0 °C
Substrates Aluminium
Viscosity, Brookfield - HBT, @ 25.0 °C Spindle TC, speed 0.5 rpm, Helipath 3000000.0 - 4500000.0 mPa·s (cP)
Viscosity, Brookfield - HBT, @ 25.0 °C Spindle TC, speed 5.0 rpm, Helipath 500000.0 - 1000000.0 mPa·s (cP)

How to

Step by Step Guide

1. Preparation - Cleaning

Apply LOCTITE® SF 7200 on old gasketing adhesive and use a wood or plastic scraper to remove residues. Remove burrs. It is recommended to use LOCTITE® SF 7063 to degrease and clean surfaces prior to applying the adhesive.

2. Preparation - Activation

If cure speed of LOCTITE® 518 is too slow due to passive metals or low temperature (below 5°C), use activator LOCTITE® SF 7240 or LOCTITE® SF 7649 (see cure speed vs activator graph in the TDS).

3. Application

Apply as a continuous close bead onto one flange surface. Place the bead close to the inner rim of the flange and encircle all holes. Small scratches can be filled by the adhesive. LOCTITE® 518 can also be applied by roller onto larger flanges or use the LOCTITE® 518 pen.

4. Assembly

Assemble flanges and tighten bolts as soon as possible.

5. Disassembly

Disassemble bolts with standard hand tools. Use jacking-screws, cast-on bosses or recesses to lift flanges apart. For corroded or seized parts, use LOCTITE® 8040 Freeze and Release.

Where to Buy

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LOCTITE 518
LOCTITE 518 is a medium-strength, general purpose gasketing product with excellent contamination tolerance. Ideal for use on casted iron, steel and aluminium flanges.

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