Loctite SF 7649 Activator for Anaerobic Adhesives 133ml

Loctite SF 7649 is an activator for Loctite anaerobic adhesives and sealants. It is a transparent, green, very low viscosity liquid based on a copper salt and an aliphatic amine in acetone. It is an activator, not a surface primer.

Use it where faster cure is needed: especially on passive metals, inert surfaces and large bond gaps, and when the prevailing temperature is low (below 15 °C). Spray or brush it on, let the solvent evaporate, then apply the anaerobic product and assemble.

Where this product is used

• Speeding the cure of Loctite anaerobic adhesives and sealants
• Passive metals and inert surfaces
• Large bond gaps
• Cold conditions, with the prevailing temperature below 15 °C
• Porous surfaces, which may need two treatments

Features

• Transparent, green liquid
• Very low viscosity: 2 mPa·s at 20 °C
• Dries in 30 to 70 seconds at 20 °C
• On-part life of 30 days or less: bond within 1 month of activation
• Fixture time of 30 seconds or less on degreased steel with Loctite 326, activating one side
• Spray or brush on
• Highly flammable and light sensitive: storage rules apply

Key specifications

Choosing the right option

Loctite 7471 Primer T Surface Preparation Activator Aerosol 133g is the other activator in the range. Loctite SF 7649 is green, and parts can be bonded within 1 month of activation.

For polyolefins bonded with cyanoacrylate adhesives, the product to use is a primer: see Loctite SF 770 Polyolefin Primer 100ml.

See also: Loctite 7471 Primer T Surface Preparation Activator Aerosol 133g, Loctite 641 Retaining Compound, Loctite 680 High Strength Retaining Compound 50ml, Loctite 648 High Strength, High Temperature Retaining Compound 50ml.

Using it

Spray or brush onto both mating surfaces. One may be enough for small gaps; porous surfaces may need two treatments.

Let the solvent evaporate fully, with good ventilation. Apply the anaerobic product and assemble immediately. Where possible, move the surfaces slightly against each other.

Never mix the activator and the adhesive directly as liquids. Do not return used material to the container.

The activator and the adhesive must never be mixed directly as liquids.

Storage and handling

Highly flammable and light sensitive. Store unopened in a dry location, optimally between 8 °C and 21 °C. Do not return used material to the container.

Limits and safety

Do not mix the activator and the adhesive directly as liquids. The solvent can affect certain plastics or coatings, so check compatibility first. Not recommended for pure oxygen or oxygen-rich systems, or as a sealant for chlorine or other strong oxidising materials. Read the safety data sheet before use.

It does not prepare plastics for bonding.