Loctite 638 Retaining Compound
638
Overview
Loctite 638 is a high-strength retaining compound for cylindrical fitting parts with bond gaps approaching 0.25mm. It works on both active and passive substrates and tolerates minor surface contamination from oils.
Specifications
- Color
- Green
- Strength
- High
- Base Type
- Urethane methacrylate (acrylic)
- Viscosity
- High (2,500 cP, Brookfield RVT spindle 3 @ 20rpm)
- Cure Type
- Anaerobic
- Service Temperature
- -55°C to 180°C (-65°F to 355°F)
Technical Information
- High viscosity, gap-filling to 0.25mm
- Oil-tolerant on minor surface contamination
- Hydrogen-certified (GASTEC QA AR-214)
Typical Applications
- Bushings and sleeves into housings and on shafts
- High-strength threadlocking and thread sealing
- Fasteners with minor oil contamination
Industries
Technical Documents
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