LOCTITE 638, 10 ml Bottle
ID: 1918981
A 1-part, designed for bonding cylindrical fitting parts, particularly with narrow bond gaps up to 0.25 mm (0.01"). Great for a fast cure on all metals, including passive substrates like stainless steel.
  • Ideal for shafts, gears, pulleys and similar cylindrical parts
  • High strength on all metals, including passive substrates (e.g. stainless steel)
  • High temperature resistance
  • Fluorescent under UV for quality control
  • KIWA GASTEC QA AR 214 certified for hydrogen gas systems
€13.58

In stock

For a retaining compound offering high strength on all metals, including passive substrates, try LOCTITE® 638. You can expect high temperature performance and good oil tolerance, a fixture time of just four minutes, and gap fill of 0.15 mm to 0.25 mm (0.006" to 0.01"). It even tolerates minor surface contaminants, including industrial oils. A high-viscosity product, it’s ideal for shafts, gears, pulleys and similar cylindrical parts, and can also be used for high-strength threadlocking and thread sealing applications. Operating temperature is -55°C to 180°C (-65°F to 355°F). LOCTITE 638 meets the performance requirements of KIWA GASTEC QA AR 214 for admixtures up to and including 100% hydrogen gas on metal threaded fittings – certifications are available in select countries.
Recommended for use with Metal: steel
Fixture time 4.0 min.
Key characteristics Fluorescent, Oil tolerant, Strength: high strength, Temperature resistant, Viscosity: high viscosity
Colour Green
Agency approvals / certificates / specifications DVGW (EN 751-1): NG-5146AR0619, NSF P1 Reg. No 123010, WRAS (BS 6920): 0511518
Applications For slip fitted parts, Retaining, For close fitting cylindrical parts
Technology Acrylic
Physical form Liquid
Application method Dispense system, Manual
Cure type Anaerobic cure
Gap fill 0.15 mm - 0.25 mm
Operating temperature -55.0 °C - 180.0 °C ( -65.0 °F - 355.0 °F )
Viscosity 2500.0 mPa·s (cP)
Shear strength, Steel 31.0 N/mm² ( 4500.0 psi )
Status In Stock
Ready to get started? Talk with our expert

We help you select the right adhesive, optimize your production process, improve product quality and safety.

Our team supports you with application expertise, dispensing solutions and laboratory testing.