Description
High-strength multi-purpose coaxial blocker - Henkel LOCTITE 638
LOCTITE 638 is a multi-purpose, high-strength, fast-curing coaxial blocker.
LOCTITE® 638 is formulated for coaxial bonding of cylindrical components, especially those with small clearances in bonding near 0.25 mm.
The product cures when confined between mating metal surfaces in the absence of air and prevents loosening and leakage caused by violent shocks and vibrations.
It works not only on active metals but also on passive substrates, showing tenacious curing.
The product good resistance to high temperatures and good tolerance to oils.
It also tolerates mild surface contaminants.
- Ideal for drive shafts, gears, pulleys and other cylindrical parts
- High strength on any metal, including passive materials (e.g., stainless steel)
- High thermal resistance
- Tolerates light contamination from trace oil
- DVGW Certificate (EN 751-1): NG-5146AR0619
- WRAS Certificate (BS 6920): 0511518
Technical information
| Applications | Coaxial clamping, For sliding parts, For adhered cylindrical parts |
| Approvals / certifications / specifications | DVGW (EN 751-1): NG-5146AR0619, NSF P1 Reg No: 123010, WRAS (BS 6920): 0511518 |
| Physical appearance | Liquid |
| Filling capabilities | 0.15 - 0.25 mm |
| Key Features | Fluorescent, Temperature resistant, Resistance: High strength, Tolerates parts greasy with oil, Viscosity: High viscosity |
| Color | Green |
| Application method | Manual, Dosing System |
| Recommended for use with | Metal: Steel |
| Shear Strength, Steel | 31.0 N/mm² (4500.0 psi ) |
| Operating temperature | -55.0 - 180.0 °C (-65.0 - 355.0 °F ) |
| Fixing time | 4.0 min. |
| Type of polymerization | Anaerobic polymerization |
| Viscosity | 2500.0 mPa.s (cP) |