Loctite 7471 Primer T Surface Preparation Activator Aerosol 133g

Loctite SF 7471 (Primer T) is an activator for Loctite anaerobic adhesives and sealants. It is a transparent, yellow to amber, very low viscosity liquid based on amine and thiazole, in an acetone and isopropanol solvent.

Use it where faster cure is needed: especially on passive metals or inert surfaces, across large bond gaps, and when the temperature is below 15 °C. Apply it to the mating surfaces, let the solvent dry, 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 coats

Features

• Transparent, yellow to amber liquid
• Very low viscosity: 2 mPa·s at 20 °C
• Dries in 30 to 70 seconds at 20 °C
• On-part life of up to 7 days
• Spray or brush on
• Fixture time of 25 minutes or less on zinc dichromate with Loctite 640, activating both sides
• Light sensitive and highly flammable: storage rules apply

Key specifications

Choosing the right option

Loctite SF 7649 Activator for Anaerobic Adhesives 133ml is the other activator in the range. Loctite SF 7471 is yellow to amber, with an on-part life of up to 7 days.

Neither is a surface primer for plastics. For polyolefins bonded with cyanoacrylate adhesives, see the primer Loctite SF 770 Polyolefin Primer 100ml.

See also: Loctite SF 7649 Activator for Anaerobic Adhesives 133ml, 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 surface may be enough for small gaps; porous surfaces may need two coats.

Let the solvent evaporate under good ventilation until the surface is dry. Apply the anaerobic product and assemble immediately. Move the surfaces against each other for a few seconds, then secure the assembly and wait for fixture.

Bond within 7 days of activation.

Storage and handling

Classified as highly flammable: store in line with local regulations, away from oxidising agents and combustible materials. The product is light sensitive, so keep translucent containers in the dark. Optimal storage is 8 °C to 21 °C; below 8 °C or above 28 °C can adversely affect the properties.

Limits and safety

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

An activator is particularly recommended when the prevailing temperature is low, below 15 °C.

It does not prepare plastics for bonding.