LOCTITE® 661 is an amber, anaerobic, low viscosity, high strength methacrylate retaining compound that also cures in the presence of UV light. It's therefore ideal for applications where any migration of the adhesive from the joint must be prevented. Fixture time on steel is 4 min and maximum diametrical clearance is 0.15 mm. Service temperature is -55 to 175°C.

• 1-part product, requires no mixing
• Dual-cure - anaerobic and UV light
• High strength
• Low viscosity, small gap filling