Loctite SF 770 Polyolefin Primer 100ml
Available
Loctite SF 770 (known as Loctite 770) is a primer for Loctite cyanoacrylate (CA) adhesives. It is based on an aliphatic amine and makes polyolefins and other low-energy surfaces bondable with Loctite CA adhesives.
It suits difficult-to-bond materials: polyethylene, polypropylene, PTFE and thermoplastic rubber. Apply it by spraying, brushing or dipping at ambient temperature, then bond within 8 hours.
Where this product is used
- Priming polyethylene before bonding with Loctite CA adhesive
- Priming polypropylene before bonding with Loctite CA adhesive
- Priming PTFE before bonding with Loctite CA adhesive
- Priming thermoplastic rubber before bonding with Loctite CA adhesive
Features
- Primer for Loctite cyanoacrylate (CA) adhesives
- Makes polyolefins and other low-energy surfaces bondable
- Very low viscosity liquid
- Applied by spraying, brushing or dipping at ambient temperature
- On-part life of 8 hours
- Not an activator for anaerobic adhesives
Key specifications
| Specification | Detail |
|---|---|
| Chemical type | Aliphatic amine |
| Use | Primer for Loctite cyanoacrylate (CA) adhesives |
| Viscosity class | Very low |
| Suitable substrates | Polyethylene, polypropylene, PTFE, thermoplastic rubber |
| Application methods | Spraying, brushing or dipping at ambient temperature |
| On-part life | 8 hours |
| Approvals | None listed in the current Henkel data sheet |
| Handling | As a highly flammable material |
| Storage | 8 °C to 21 °C, unopened, dry |
| Technical data sheet | Henkel TDS May 2021 (Reference 1.5) |
Selecting the right option
Pair Loctite SF 770 with a Loctite cyanoacrylate adhesive, such as Loctite 406 Instant Adhesive for Plastics and Rubbers or Loctite 460 Low Odour Low Bloom Instant Adhesive 25ml.
It is not an activator for anaerobic retaining compounds or threadlockers. For those see Loctite SF 7649 Activator for Anaerobic Adhesives 133ml or Loctite 7471 Primer T Surface Preparation Activator Aerosol 133g.
Using it
Apply by spraying, brushing or dipping at ambient temperature. Bond within 8 hours of priming.
Handle as a highly flammable material. Check the safety data sheet for handling and storage.
Storage and handling
Store unopened in a dry location, optimally between 8 °C and 21 °C. Storage below 8 °C or above 28 °C can adversely affect the properties of the product.
Limits and safety
Not recommended for assemblies that need high peel strength, or for easy-to-bond substrates. 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.
Frequently asked questions
Which plastics does Loctite SF 770 prepare for bonding?
Polyethylene, polypropylene, PTFE and thermoplastic rubber, which are difficult to bond, for bonding with Loctite cyanoacrylate adhesives.
How do I apply Loctite SF 770?
By spraying, brushing or dipping at ambient temperature.
How long do primed parts stay active?
The on-part life is 8 hours.
Is Loctite SF 770 suitable where high peel strength is needed?
No. Henkel says it is not recommended for assemblies where high peel strength is required.
Does Loctite SF 770 have approvals?
The current Henkel data sheet lists no approvals; contact AIMS if you need a certificate for a specific application.
Can I use Loctite SF 770 on easy-to-bond plastics?
Henkel does not recommend it for easy-to-bond substrates. It is intended for difficult-to-bond materials such as polyethylene and polypropylene.
Related products
See also: Loctite 406 Instant Adhesive for Plastics and Rubbers, Loctite 460 Low Odour Low Bloom Instant Adhesive 25ml, Loctite 401 Instant Adhesive, Loctite 454 Instant Adhesive Gel 20g, Loctite 416 Super Bonder Instant Adhesive 25ml.
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