LOCTITE 620 High Temperature Retaining Compound
Features and Benefits
- Ideal for retaining pins in radiator assemblies, sleeves in pump housings and bearings in auto transmissions
- High temperature resistance
- DVGW approval (EN 751-1): NG-5146AR0622
Documents and Downloads
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|Agency Approvals / Specifications||DVGW (EN 751-1): NG-5146AR0622|
|Application Method||Dispense System, Manual|
|Applications||Retaining, For High Temperature Applications, For Slip Fitted Parts|
|Cure Type||Anaerobic Cure|
|Fixture Time||60.0 min.|
|Gap Fill||0.15 - 0.25 mm|
|Key Characteristics||Cure Speed: Slow Cure, Temperature: High Temperature, Gap Filling, Viscosity: High Viscosity, Strength: Medium to High Strength|
|Operating Temperature||-55.0 - 230.0 °C (-65.0 - 450.0 °F )|
|Shear Strength, Steel||26.0 N/mm² (3800.0 psi )|
|Viscosity||8000.0 mPa·s (cP)|
Step by Step Guide
1. Preparation - Cleaning
Use LOCTITE® 790™ for easier removal of old retaining adhesive residue. It is recommended to use LOCTITE® 7070™ to degrease and clean surfaces prior to applying the adhesive. For gaps larger than 0.5mm or worn out shafts, bearing seats or keyways, use LOCTITE® metal-filled compounds or LOCTITE® 660 Retaining Compound.
2. Preparation - Activation
If cure speed is too slow due to passive metals (stainless steel, aluminum and plated metals) or low temperature (below 5°C), use LOCTITE® SF 7649™ activator. Allow to dry.
3a. Application - For Slip-Fitted Assemblies
Apply adhesive around the leading edge of the male component and the inside of the female component and use a rotating motion during assembly to ensure good coverage. Wipe off excess adhesive.
3b. Application - For Press-Fitted Assemblies
Apply 360 degree beads of adhesive to both bond surfaces at the leading edges of insertion or engagement, and assemble at high press-on rates. Wipe off excess adhesive.
3c. Application - For Shrink-Fitted Assemblies
Apply the adhesive onto the male component; heat the female component to cause expansion for free assembly. Assemble components and allow temperatures to equilibrate. Wipe of excess adhesive.
For manual assembly of adhesive the use of the LOCTITE® Pro Pump or LOCTITE® Peristaltic Hand Pump is recommended to ensure a consistent application volume. For semi-automatic or fully-automated dispensing options contact our technical service team for advice.
Apply localized heat to approximately 500°F/260°C; disassemble while parts are hot. For corroded or seized parts, use LOCTITE® 8040™ Freeze and Release.