LOCTITE 638 High Strength Fast Cure Retaining Compound

LOCTITE Brand: LOCTITE

LOCTITE 638 has been designed for the bonding of cylindrical fitting parts, particularly where bond gaps can approach 0.25mm. It cures when confined, in the absence of air, between close-fitting metal surfaces and prevents loosening and leakage due to shock and vibration.

LOCTITE 638 not only works on active metals but also on passive substrates, exhibiting robust cure performance. It offers high-temperature performance and good oil tolerance, and tolerates minor surface contaminants.

  • High temperature resistance
  • Tolerates minor contaminants, including industrial oils
  • High strength on all metals, including passive substrates (e.g. stainless steel)
  • Ideal for shafts, gears, pulleys and similar cylindrical parts
  • Colour: Green
  • Max. gap size: 0.25mm
  • Service temperature range: -55 to +180°C
  • P1 NSF Reg. No: 123010
  • DVGW Approval (EN 751-1): NG-5146AR0619
  • WRAS Approval (BS 6920): 0511518
  • Supplied in applicator of 10ml, 50ml or 250ml
  • LOCTITE type 638
Description Image Product Buy Pricing (Ex VAT) Volume Type Strength Dispensing Method Agency approvals / certificates / specifications Application method Applications Colour Cure type Fixture time Gap fill Key characteristics Operating Temperature Physical form Recommended for use with Shear strength, Steel Technology Viscosity
LOCTITE 1918981 638 High Strength Fast Cure Retaining Compound 10ml
LOCTITE 1918981 638 High Strength Fast Cure Retaining Compound 10ml
Standard range
Order code: 87-7077
MPN: 1918981

7 in stock, despatched same dayAdditional quantity lead time 7 days
1+ £10.89
Price per unit Ex VAT 		10ml Retainer High Bottle NSF P1 Reg. No 123010, DVGW (EN 751-1): NG-5146AR0619, WRAS (BS 6920): 0511518 Dispense system, Manual Retaining, For slip fitted parts, For close fitting cylindrical parts Green Anaerobic cure 4.0 min 0.15 mm - 0.25 mm Strength: high strength, Temperature resistant, Oil tolerant, Fluorescent, Viscosity: high viscosity -55.0 °C - 180.0 °C ( -65.0 °F - 355.0 °F ) Liquid Metal: steel 31.0 N/mm² ( 4500.0 psi ) Acrylic 2500.0 mPa·s (cP)
LOCTITE 1803365 638 High Strength Fast Cure Retaining Compound 50ml
LOCTITE 1803365 638 High Strength Fast Cure Retaining Compound 50ml
Standard range
Order code: 63-1080
MPN: 1803365

8 in stock, despatched same dayAdditional quantity lead time 7 days
1+ £45.32
Price per unit Ex VAT 		50ml Retainer High Bottle NSF P1 Reg. No 123010, DVGW (EN 751-1): NG-5146AR0619, WRAS (BS 6920): 0511518 Dispense system, Manual Retaining, For slip fitted parts, For close fitting cylindrical parts Green Anaerobic cure 4.0 min 0.15 mm - 0.25 mm Strength: high strength, Temperature resistant, Oil tolerant, Fluorescent, Viscosity: high viscosity -55.0 °C - 180.0 °C ( -65.0 °F - 355.0 °F ) Liquid Metal: steel 31.0 N/mm² ( 4500.0 psi ) Acrylic 2500.0 mPa·s (cP)
LOCTITE 1803042 638 High Strength Fast Cure Retaining Compound 250ml
LOCTITE 1803042 638 High Strength Fast Cure Retaining Compound 250ml
Standard range
Order code: 87-7079
MPN: 1803042

Available to back orderBack-order availability date - 30/03/2026
1+ £173.01
Price per unit Ex VAT 		250ml Retainer High Bottle NSF P1 Reg. No 123010, DVGW (EN 751-1): NG-5146AR0619, WRAS (BS 6920): 0511518 Dispense system, Manual Retaining, For slip fitted parts, For close fitting cylindrical parts Green Anaerobic cure 4.0 min 0.15 mm - 0.25 mm Strength: high strength, Temperature resistant, Oil tolerant, Fluorescent, Viscosity: high viscosity -55.0 °C - 180.0 °C ( -65.0 °F - 355.0 °F ) Liquid Metal: steel 31.0 N/mm² ( 4500.0 psi ) Acrylic 2500.0 mPa·s (cP)
Order codeVolume
87-707710ml
63-108050ml
87-7079250ml


Trustpilot