LOCTITE 648- Retaining LOCTITE 648 is a low viscosity, high strength retaining LOCTITE® 648 is a green, fluorescent, low viscosity, high compound with high temperature resistance. Ideal for strength, urethane methacrylate acrylic, anaerobic retaining retention of parts with a clearance or interference fit. compound designed for bonding cylindrical fitting parts. It prevents loosening and leakage from shock and vibration. Typical applications include holding gears and sprockets onto gearbox shafts and rotors on electric motor shafts. It provides robust curing performance.