Bondloc B638 Retainer is designed to give high strength retention under cyclic loading. It can retain its full strength and not suffer fatigue under load stress. It is a cylindrical parts supplement, suited to structural components such as cylindrical parts under dynamic load, keys, splines, even structural tubing with close tolerance fit. Specifications: Resin: Urethane Acrylate. Colour: Green. Fixture Speed No Activator: 5 mins. Fixture Speed With Activator: 85°C. Shelf Life: 12 months min. Specific Gravity: 1.08. Max Operating Temperature: -55°C to + 150°C. Cured Performance: Full Cure Time: 24 hours. Static shear strength: 30 N/mm².