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LOCTITE® 518™
LOCTITE® 518™ is a reliable gasketing solution that provides medium-strength sealing for flange surfaces with excellent contamination tolerance. This anaerobic adhesive sealant eliminates the need for traditional gaskets by forming a flexible, solvent-resistant seal. It fills gaps, withstanding vibrations commonly caused during operation, and can be easily disassembled when needed. It is ideal for use on casted iron, steel, and aluminum flanges traditionally used in industrial, aerospace, and automotive applications.
LOCTITE® 518™ is a single-component gasketing solution designed specifically for creating strong, durable seals between flange surfaces. It is a flexible, anaerobic adhesive that cures in the absence of air and the presence of metal ions and minor surface contaminations from oils, such as lubrication, cutting, anti-corrosion, and protection fluids. LOCTITE® 518™ eliminates the need for traditional gaskets by filling surface imperfections and gaps up to 0.25 mm, providing a flexible and solvent-resistant seal. This gasketing solution offers exceptional physical properties, ensuring a tight and leak-free seal that can withstand vibrations, fluid pressure, and extreme temperatures ranging from -55.0°C–150.0°C (-65.0°F–300.0°F). It also provides medium-strength bonding, allowing for easy disassembly of sealed components when necessary and making maintenance and repairs more convenient.
Specifications
Chemical Type: Dimethacylate ester Appearance (uncured): Red, gel-like material Fluorescence: Positive under UV light Viscosity: Thixotropic Viscosity, Brookfield, 25°C, mPa·s (cP) (Spindle TC, speed 0.5 rpm): 4,000,000 Cure: Anaerobic Secondary cure: Activator Strength: Medium Specific gravity @ 23°C 1.1 Elongation, at break, ISO 527-2, %: 64 Tensile strength, ISO 527-2 N/mm² (psi): 7.3 (1,060) Tensile modulus, ISO 527-2 N/mm² (psi): 54 (7,850) Temperature/humidity ranges: 23 °C / 50% RH = 23+2 °C / 50+5% RH
Primary Chemistry: Dimethylacrylate ester
Features & Benefits
Anaerobic gasketing solution Medium-strength Excellent contamination tolerance Excellent chemical-resistant seal Forms a flexible seal that will flex with minor flange movements Resistance to low pressures immediately after assembly of flanges Temperature resistance of -65°F to 300°F Suitable for gaps up to 0.25 mm Will not tear or decay Gel-type consistency Resists high pressure with fully cured Easy to automate
Problems Solved
Compression set or misaligned gaskets The need for precut gaskets Leaks caused by vibration, pressurization, and thermal expansion Poor adhesions to plastic substrates, glass, ceramics, or metals Manual assembly of conventional gaskets
Applications
Ideal for use on casted iron, steel, and aluminum flanges Forming in-place gaskets for pumps, thermostats, compressors, transmission housings, and axle covers Gasketing of machined, rigid metal flanges Sealing close-fitting joints between rigid metal faces and flanges
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Thank you for your inquiry and interest in ChemPoint. We will respond to you shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
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