• Series: 638
• Type: Retaining Compound
• For Use With: Bonding
• Physical Form: Liquid
• Container Type: Bottle
• Container Capacity: 10ml
• Cure Time: 24h
• Chemical Composition: Dimethacrylate Ester, Methacrylate Monomer, 2-Hydroxyethyl Methacrylate, Polyurethane Methacrylate Resin, Acrylic Acid, Hydroxyalkyl Methacrylate, Cumene Hydroperoxide, Polyglycol Dimethacrylate, Methacrylic Acid
• Odor: Characteristic
• Color: Green
• Primary Color: Green
• Specific Gravity: 1.1
• Viscosity Measurement: 2000 to 3000mPa/s
• VOCs Content: <3%
• Flash Point: 199.94°F
• Maximum Operating Temperature: +300°F
• Minimum Operating Temperature: -65°F
• Applications: Retaining

For a retaining compound offering high strength on all metals, including passive substrates, choose LOCTITE® 638. You can expect high temperature performance and good oil tolerance, a fixture time of just four minutes, and gap fill of 0.15mm to 0.25mm. It even tolerates minor surface contaminants, including industrial oils. A high viscosity (thickness) product, it’s ideal for shafts, gears, pulleys, and similar cylindrical parts. Operating temperature is 55°C to 180°C (-65°F to 355°F).