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3M Scotch-Weld Anaerobic Activator AC649 is an acetone-based green surface activator/primer that cures anaerobic adhesives on inactive or very cold surfaces. For normal active surfaces, this activator accelerates both fixture and cure times significantly.

  • One-part surface activator for use with anaerobic adhesives
  • Promotes adhesion and cure of 3M Scotch-Weld Threadlocker, Pipe Sealant, Retaining Compound and Gasket Maker
  • Ideal for inactive or very cold surfaces
  • Accelerates both fixture and cure times significantly

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