LOCTITE® 620™ is specifically formulated for retaining applications, where it is used to bond cylindrical fitting parts together. This adhesive cures in the absence of air when confined between closely fitting metal surfaces. It effectively prevents loosening and leakage caused by shock and vibration. Typical applications for include securing locating pins in radiator assemblies, fitting sleeves into pump housings, and retaining bearings in automotive transmissions. It is particularly well-suited for applications where a temperature resistance of up to 200°C is necessary.

Supplied By: Henkel Corporation

Product Code: H01938

Regional Availability: Canada

Product Type: 1K (1 component) Adhesive, Adhesive

    Enhanced TDS

    Identification & Functionality

    Features & Benefits

    Ready-to-Use Product Features
    Product Highlights
    Technology Acrylic
    Chemical Type

    Methacrylate ester


    One component -requires no mixing

    Viscosity High
    Cure Anaerobic
    Secondary Cure Activator
    Application Retaining
    Strength Medium to High

    Applications & Uses

    Application Area
    Directions for Use

    For Assembly

    1. For best results, clean all surfaces (external and internal) with a LOCTITE® cleaning solvent and allow to dry.
    2. If the material is an inactive metal or the cure speed is too slow, spray with Activator 7471™ or 7649™ and allow to dry.
    3. Shake the product thoroughly before use.
    4. For Slip Fitted Assemblies, apply adhesive around the leading edge of the pin and the inside of the collar and use a rotating motion during assembly to ensure good coverage.
    5. For Press Fitted Assemblies, apply adhesive thoroughly to both bond surfaces and assemble at high press on rates.
    6. For Shrink Fitted Assemblies the adhesive should be coated onto the pin, the collar should then be heated to create sufficient clearance for free assembly.
    7. Parts should not be disturbed until sufficient handling strength is achieved

    For Disassembly

    Apply localized heat to the assembly to approximately 250 °C. Disassemble while hot.

    For Cleanup
    Cured product can be removed by soaking in a Loctite® solvent, e.g. Loctite® 7200 and mechanical removal with a soft scraper. Avoid formation of dust and aerosols. Complete the cleaning process by wiping with a soft cloth dampened with Loctite® Cleaner, e.g. Loctite® 7063 or Loctite® ODC-free cleaner.


    Physical Form
    Green liquid (uncured)
    Chemical/Solvent Resistance

    % of initial strength

    Environment °C 100 h 500 h 1000 h
    Motor oil (MIL-L-46152) 125 100 100 100
    Unleaded Petrol 22 95 95 95
    Brake fluid 22 100 100 100
    Water/glycol 50/50 87 95 80 80
    Ethanol 22 100 100 75
    Acetone 22 95 95 95

    Packaging & Availability

    Packaging Type
    Regional Availability
    • Canada

    Storage & Handling


    Store product in the unopened container in a dry location. Storage information may be indicated on the product container labeling. Optimal Storage: 8 °C to 21 °C. Storage below 8 °C or greater than 28 °C can adversely affect product properties.