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LOCTITE 661

Features and Benefits

LOCTITE 661

High strength, low viscosity, anaerobic, methacrylate retaining compound that is also cured by UV light to prevent migration from the joint.

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 175ºC.
  • 1-part product, requires no mixing
  • Dual-cure - anaerobic and UV light
  • High strength
  • Low viscosity, small gap filling
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Technical Information

Chemical Basis / Base Methacrylate
Color Amber
Diametrical Clearance (Maximum) 0.15 mm
Fixture Time 4 min.
Fixture Time Temperature 4 °C
Shear Strength 15 N/mm²
Substrates Metal: Steel
Viscosity Max 600
Viscosity Min 400
Viscosity Unit mPa.s (cP) Brookfield