LOCTITE SF 7649 MIL-SPEC Primer

(Known as LOCTITE 7649 )


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Surface Preparation - activator. Solvent-based. Low temperature curing.

LOCTITE® SF 7649™ MIL-SPEC Primer decreases the set-up time of Loctite brand threadlockers and increases breakaway torque on most fastener surfaces. This anaerobic primer allows application of threadlockers in cold weather. Contains no ozone-depleting compounds. Mil Spec: Mil-S-22473E Grade N Form R. ASTM-D5363 approved.

Your benefits

  • Increases cure speed on passive and inactive surfaces
  • For large bond gaps
  • For low-temperature curing (< 5°C)


Applications Accelerators, Activators, Primers (for adhesives)
Surface Treatments
Specifications Met Canadian Food Inspection Agency (CFIA)
Agency Approvals / Specifications ASTM D-5363 for new designs, NSF P1, MIL-S-22473E for existing designs, NSF/ANSI 61, CFIA Listed
Application Method Spray
Applications Anaerobic Priming, Structural Bond Priming
Chemical Basis / Base Acetone
Color Clear, Green
Dry Time 70 sec.
Key Characteristics Ozone Depleting Chemical (ODC) Free
Number of Components 1 Part
On-Part Life Time 30 days
Physical Form Aerosol, Liquid
Viscosity (Brookfield mPa.s (cP)) 2
Viscosity Temperature (°C) 25
Viscosity Temperature (°F) 77