Loctite 638 high-strength anaerobic retaining compound for slip-fit cylindrical assemblies (bearings, bushings, sleeves, gears on shafts). Green, 50 ml bottle. Used by maintenance technicians and installation crews across industrial, marine and construction service.
| Dimethacrylate ester (urethane methacrylate), green; one-component anaerobic retaining compound that cures in the absence of air between close-fitting metal parts; oil-tolerant, high temperature resistance. Bonds cylindrical slip- and press-fit assemblies and prevents loosening and leakage from shock and vibration. Viscosity approx 2,750 mPa.s (Brookfield); compressive shear strength on steel pins/collars approx 25 N/mm2 per ISO 10123; maximum diametral gap fill 0.25 mm; fixture time on steel approx 4 min, full cure 24 h; operating temperature -55 to +180 degC; specific gravity approx 1.1. Henkel order no. 21448 / IDH 1835936, 50 ml bottle. | |
| Type | Retaining Compound |
| Strength | High |
| Color | Green |
| Fill size | 50 ml |
| Operating temperature | -55 to +180 °C |
| Specific gravity | 1.1 |
| Compressive shear strength | 25 N/mm² |
| Chemical base | Dimethacrylate ester (urethane methacrylate) |
| Cure | Anaerobic (one-component) |
| Standards | ISO 10123 |
| Temperature range | -55 to +180 degC |
| MOQ | 1 |