LOCTITE® 518 Gasket Sealant
Known as Loctite 518 Gasket Eliminator Flange Sealant
Features and Benefits
Available sizes:
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
- 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
- Easy to automate
- Reduces process costs – eliminates manual assembly of conventional gaskets
- NSF P1 Reg. No. 123758
Documents and Downloads
Safety Data Sheets and RoHs
- 25 ml Bottle 12.0/case - IDH 2392164
LOCTITE 518 PEN, 25ml 2392164 en-US
IDH:
2392164
EAN:
079340013001
Size Case: 25 ml Bottle
Quantity: 12.0/case
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Additional Documents
Technical Information
| Application method | Dispense System, Manual |
| Applications | Rigid Assembly Gasketing, Sealing |
| Color | Red |
| Cure type | Anaerobic Cure |
| Fixture time, Steel | 25.0 min. |
| Gap fill, Unprimed | 0.25 mm |
| Key characteristics | Fluorescent, For machined, rigid flanges, Immediate Low Pressure Sealing, Strength: Medium Strength, Surface Contamination-Tolerant, Thixotropic |
| Operating temperature | -55.0 - 150.0 °C (-65.0 - 300.0 °F ) |
| Physical form | Gel |
| Recommended for use with | Metal: Aluminum, Metal: Iron - Cast Iron, Metal: Passive Metal, Metal: Steel |
| Specific gravity, @ 25.0 °C | 1.1 |
| Viscosity | 750000.0 mPa·s (cP) |
How to
Step by Step Guide
1. Preparation - Cleaning
Apply LOCTITE® SF 790™ to old gasket or gasket sealants and use a wood or plastic scraper to remove residues from flange surfaces. Remove burrs. It is recommended to use LOCTITE® SF 7070™ to degrease and clean surfaces prior to applying the sealant.
2. Preparation - Activation
If cure speed of LOCTITE® 518™ is too slow due to passive metals or low temperature (below 5°C), use LOCTITE® SF 7649™ activator. Allow to dry.
3. Application
Apply a continuous bead of sealant onto one flange surface. Place the bead close to the inner rim of the flange and encircle all bolt holes. Small surface scratches will be filled by the adhesive. LOCTITE® 518™ can also be applied by roller onto larger flanges.
4. Assembly
Assemble flanges and tighten bolts as soon as possible. Wipe away any excess squeeze-out, as this will not cure when exposed to air due to sealant's anaerobic curing properties.
5. Disassembly
Disassemble bolts with standard hand tools. Use jacking-screws, cast-on bosses or recesses to lift flanges apart. Once disassembled, apply LOCTITE® SF 790™ on old sealant and use a wood or plastic scraper to remove residues from flange surfaces. For corroded or seized parts, use LOCTITE® LB 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 aluminum flanges.
- 25 ml Bottle 12.0/case - IDH 2392164
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How do I seal leaking flanges or components?
Are threadlockers/sealants/gasketing materials resistant to gasoline, diesel, engine oil, water, glycol, acids, alkalis, hydraulic fluid, etc.?
What are the differences between silicone gasketing products and MS (modified silane) products?
What gasketing material can be used on high temperature applications in engines or exhausts?
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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 aluminum flanges.