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LOCTITE® 620™
LOCTITE® 620™ is a high viscosity retaining compound that securely bonds cylindrical fitting parts, preventing loosening and leakage commonly caused by shock and vibration. Its fast curing and enhances the assembly strength and durability of assemblies for various industries.
- Manufacturer: Henkel
- Product Line: LOCTITE® Retaining Compounds
- Product: LOCTITE® High Temp Retaining Compounds
- Industries: Adhesives | Building & Construction | Maintenance, Repair, Overhaul | Metal Processing & Fabrication
- Authorized Countries: Canada | Mexico | United States
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Overview
LOCTITE® 620™ is a high-strength retaining compound formulated for its exceptional bonding and sealing properties. It securely bonds cylindrical fitting parts, such as bearings, lock bushings, cylindrical shafts, subfractional horsepower motors, and augmenting press fits, by filling the gaps between them up to 0.2 mm. Its anaerobic formula makes it capable of curing when confined in the absence of air for these close fitting metal surfaces. The compound is particularly effective in preventing loosening, leakage, and corrosion in mechanical assemblies.
LOCTITE® 620™ provides excellent resistance to high temperatures up to 200°C for applications with extreme conditions. Typical applications include locating pins in dilator assemblies, sleeves in pump housings and bearings in auto transmissions. It is easy to apply, requiring minimal surface preparation and cures quickly, forming a durable bond that enhances overall strength and integrity of assemblies.
Specifications
Chemical Type: Methacrylate ester
Appearance (uncured): Green liquid
Viscosity: High
Viscosity, Brookfield - RVT, 25 °C, mPa·s (cP) (Spindle 5, speed 20 rpm): 8,500
Viscosity, EN 12092 - MV, 25 °C, after 180 s, mPa·s (cP) (Shear rate 129 s¯¹): 1,800
Cure: Anaerobic
Secondary cure: Activator
Application: Retaining
Strength: Medium to high
Specific Gravity @ 23°C: 1.16
Specific Heat, kJ/(kg·K): 0.3
Elongation, at break ISO 37, %: <1
Temperature/Humidity Ranges: 23 °C / 50% RH = 23+2 °C / 50 +5% RH
Features & Benefits
- High temperature retaining compound and threadlocker
- Fills bond gaps up to 0.2 mm
- Maximum strength at room temperature
- Cures when confined in the absence of air
- Prevents loosening and leakage from shock and vibration
- Robust curing performance
- High temperature performance
- High viscosity
- Prevents metal fretting and corrosion
Problems Solved
Backlash in worn assemblies Loosening and leakage from shock and vibration Inability of adhesive to fill difficult-to-reach cracks and crevices
Applications
Bonding of cylindrical parts Retaining higher temperature assemblies Locating pins in radiator assemblies Locking bushings and sleeves into housings and on shafts
Related Applications
Adhesives
Building & Construction
Maintenance, Repair, Overhaul
- Assembly & Run-in
- Bearings
- Electric Motors
- Gear Boxes
- Machining
- Noise, Vibration, Harshness
- Pumps
- Threads & Thread Connections
- Valves, Packings, Seals & O-Rings
Related Chemistries
Related End Markets
Maintenance, Repair, Overhaul
- Facility Infrastructure
- General Industrial
- Heavy Industry
- Metal Processing & Fabrication
- Transportation
Related Functions
Adhesives
Building & Construction
Maintenance, Repair, Overhaul
Metal Processing & Fabrication
Related Technologies
Adhesives
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