Henkel Adhesive Technologies

Henkel Adhesive Technologies

Retaining compounds


High strength, general purpose bonding of cylindrical parts

Designed for bonding cylindrical fitting parts, particularly with narrow bond gaps up to 0.25mm. Great for a fast cure on all metals, including passive substrates like stainless steel. 

All marks used are trademarks and/or registered trademarks of Henkel and its affiliates in the US, Germany, and elsewhere.

Part no. (SKU/IDH) 1835936
LOCTITE® 638, 50 ml Bottle

Size Please make your selection 50 ml



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). 

Agency approvals / certificates / specifications:

DVGW (EN 751-1): NG-5146AR0619,NSF P1 Reg No: 123010,WRAS (BS 6920): 0511518

Application method:

Dispense System,Manual


For Close Fitting Cylindrical Parts,For Slip Fitted Parts,Retaining



Cure type:

Anaerobic Cure

Fixture time:

4.0 min.

Gap fill:

0.15 mm - 0.25 mm

Key characteristics:

Fluorescent,Oil Tolerant,Strength: High Strength,Temperature Resistant,Viscosity: High Viscosity

Operating temperature:

-55.0 °C - 180.0 °C (-65.0 °F - 355.0 °F)

Physical form:


Recommended for use with:

Metal: Steel

Shear strength, Steel:

31.0 N/mm² (4500.0 psi)


2500.0 mPa·s (cP)

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