LOCTITE® 638 is a high-strength retaining compound designed for bonding cylindrical parts in demanding environmentas. It ensures reliable performance in applications with high loads and extreme temperatures, preventing wear and loosening.
Colour: green
Viscosity: 2.000-3000 mPa.s
Fixture time: 4 minutes on steel, 6 minutes on stainless steel
Full cure time: 24 hours
Shear strength: High (up to 4.500 psi)
Temperature Range: -55°C to +150°C
Chemical resistance: Resistant to oils, fuels, and industrial fluids
Primary Chemistry:
Methacrylate ester
LOCTITE® 638 is a premium, high-strength retaining compound specifically engineered to bond cylindrical metal components. Its advanced formula ensures optimal performance in high-temperature environments (up to +150°C), as well as in assemblies that are exposed to shock, vibration, or heavy loads. LOCTITE® 638 cures anaerobically, forming a tough, rigid bond between closely fitted parts, making it ideal for retaining gears, pulley, bearings, and bushings.
This adhesive is highly resistant to a wide range of chemicals, including oils, fuels, and other industrial fluids, ensuring long-lasting retention. LOCTITE® 638 in known for its gap-filling properties, which make it effective even when slight surface imperfections are present between components.
Colour: green
Viscosity: 2.000-3000 mPa.s
Fixture time: 4 minutes on steel, 6 minutes on stainless steel
Full cure time: 24 hours
Shear strength: High (up to 4.500 psi)
Temperature Range: -55°C to +150°C
Chemical resistance: Resistant to oils, fuels, and industrial fluids
Primary Chemistry:
Methacrylate ester
Component Loosening
Wear and fretting
High temperature degradation
Chemical attack
Retaining geras and pulleys
Bonding Bearing to housings
Securing bushings
Assembly of electric motors
Automotive engine assembly
Pumps and compressors
Power generation equipment
Aerospace applications
Heavy machinery
Mining and construction equipment
Marine applications
Wind turbines
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