LOCTITE® 518
Features and Benefits
Available sizes:
This general purpose, semi-flexible anaerobic-curing gasketing product is ideal for sealing close fitting, rigid machine flanges made of aluminium, iron or steel.
LOCTITE® 518 is a general purpose, primerless, semi-flexible, form-in-place anaerobic flange sealant. It cures – even in the presence of minor surface contaminants – to seal close fitting joints between rigid metal flanges, and will flex with minor flange movements. It provides resistance to low pressures immediately after assembly of flanges and is ideal for use on aluminium substrates where you need very good flexibility. Typically used as a form-in-place gasket for pumps, thermostats, compressors, transmission housings and axle covers, it not only works on active metals (e.g. mild steel) but also on passive substrates, such as aluminium with a low copper content. You can expect gap performance to 0.25mm.
- 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
- Standard Cartridge 10.0/case - IDH 2069174
- Standard Cartridge 10.0/case - IDH 2069177
- Pen 12.0/case - IDH 2392090
2069177 en-TZ
IDH:
2069177
EAN:
5010266012131
Size Case: Standard Cartridge
Quantity: 10.0/case
2392090 en-TZ
IDH:
2392090
EAN:
4058093019474
Size Case: Pen
Quantity: 12.0/case
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Additional Documents
Technical Information
| Application method | Dispense system, Manual |
| Applications | Rigid assembly gasketing, Sealing |
| Chemical basis / base | Dimethacrylate ester |
| Colour | 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 |
| Number of components | 1 part |
| Operating temperature | -55.0 - 150.0 °C (-65.0 - 300.0 °F ) |
| Physical form | Gel |
| Recommended for use with | Metal: aluminium, Metal: iron - cast iron, Metal: passive metal, Metal: steel |
| Specific gravity, @ 25.0 °C | 1.1 |
| Storage temperature | 8.0 - 21.0 °C |
| Viscosity | 750000.0 mPa·s (cP) |
How to
Step by Step Guide
1. Preparation - Cleaning
Apply LOCTITE® SF 7200 and use a wooden or plastic scraper to remove any residual/cured gasketing material. Remove any burrs that may create shimming between the flanges. It is recommended to use LOCTITE® SF 7063/7064 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.
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® LB 8040 Freeze and Release.
Frequently Asked Questions
How do I seal leaking flanges or components?
Are threadlockers / sealants / gasketing materials resistant to petrol, diesel, engine oil, water, glycol, acids, alkalis, hydraulic fluid etc.?
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LOCTITE® 518
This general purpose, semi-flexible anaerobic-curing gasketing product is ideal for sealing close fitting, rigid machine flanges made of aluminium, iron or steel.