Loctite 638 High Strength Retaining Compound 50ml
Loctite 638 high-strength, fast-curing retaining compound in a 50 ml bottle for cylindrical assemblies and threaded metal fittings.
Loctite 638 High Strength Retaining Compound 50ml is a high-strength, fast-curing, general-purpose retaining compound supplied in a 50 ml bottle for securing cylindrical parts on metal surfaces. Its high viscosity provides gap fill from 0.15 mm to 0.25 mm, making it suitable for components where a precise, durable fit is required.
Overview
Loctite 638 is designed to bond cylindrical parts with strong retention, offering a practical solution for industrial assembly and maintenance work. It is able to bond passive substrates such as stainless steel, which many adhesives do not bond effectively. The compound reaches handling strength in four minutes and maintains performance at high temperatures and when exposed to industrial oils. Its tolerance to minor surface contaminants, including oils, can simplify preparation where perfect cleanliness is not always possible.
Key Features
- Suitable for permanently retaining shafts, gears, pulleys, bearings, and other cylindrical fittings
- High-strength threadlocking to lock and seal threaded metal fittings, providing vibration resistance and preventing leakage
- Meets the KIWA GASTEC QA AR 214 standard for sealing threaded fittings in systems using up to 100% hydrogen gas
- Fluorescent under UV light, allowing easy inspection and verification of correct adhesive application
- Maintains performance across an operating temperature range from -55°C to +180°C
Specifications
- Volume: 50 ml bottle for precise dispensing
- Gap fill: 0.15 mm to 0.25 mm
- Handling strength: four minutes
- Dimensions: width 3.3, depth 1.5, height 4.3
- Weight: 55 g
Supplied in a 50 ml bottle for precise dispensing, Loctite 638 is intended for use by mechanics, engineers, and DIY users working with metal assemblies that require reliable retention and sealing.
- For permanently retaining shafts
- For retaining gears, pulleys, and bearings
- For other cylindrical fittings
- For locking and sealing threaded metal fittings
- Volume: 50 ml
- Weight: 55 g
- Width: 3.3
- Depth: 1.5
- Height: 4.3
- Viscosity: High
- Gap Fill: 0.15 mm to 0.25 mm
- Operating Temperature Range: -55°C to +180°C
- Handling Strength: Four minutes
- Standard: KIWA GASTEC QA AR 214 (sealing threaded fittings in systems using up to 100% hydrogen gas)
- Special Feature: Fluorescent under UV light for inspection
- Special Feature: Suitable for passive substrates such as stainless steel
- Special Feature: Tolerates minor surface contaminants, including oils
Always follow local regulations and product guidance.
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