Loctite SF 770 Primer



Loctite SF 770 Prism Heptane Primer 52ml

  • Viscosity : Very low
  • Color : Clear: Ultra Clear
  • Curing Type : Not applicable
  • Application : CA surface primer

Loctite SF 770 is a primer used to make polyolefin and other low-energy surfaces suitable for bonding with LOCTITE instant adhesives. The cured performance of LOCTITE® instant adhesives is ensured on such treated surfaces. It is only recommended for difficult-to-bond substrates which include polyethylene, polypropylene, polytetrafluoroethylene (PTFE) and thermoplastic rubber materials. LOCTITE SF 770 is not recommended in assemblies where high peel strength is required.

  • Only for difficult-to-bond plastics
  • Improves adhesion of instant adhesives to polyolefins and other low surface energy plastics
SF 770™ is used to make polyolefin and other low
energy surfaces suitable for bonding with Loctite cyanoacrylate
adhesives. On such treated surfaces the cured performance of
cyanoacrylate adhesives is generally similar to that
described in the TDS for the relevant adhesive. It is only
recommended for difficult to bond substrates which include
polyethylene, polypropylene, polytetrafluoroethylene (PTFE)
and thermoplastic rubber materials. LOCTITE®
SF 770™
Polyolefin Primer is not recommended in assemblies where
high peel strength is required.

Fixture time and cure speed achieved as a result of using
SF 770™ depend on the adhesive used and the
substrate bonded.
Effect on Cure Speed of Cyanoacrylate Adhesives

SF 770™ also behaves as an activator and
accelerates the cure speed of cyanoacrylate adhesives.
Fixturing time on most primed substrates is less than 5
seconds but 24 hours at room temperature (22 °C) should be
allowed for adhesive to develop maximum bond strength.
Effect on Cured Properties of Cyanoacrylate Adhesives

Products 406, 496 and 460 are based on ethyl, methyl and
ß-Methoxyethyl esters respectively. Other LOCTITE®
products based on these esters will behave in a similar fashion
to these examples.

This product is not recommended for use in pure oxygen
and/or oxygen rich systems and should not be selected as
a sealant for chlorine or other strong oxidizing materials.
For safe handling information on this product, consult the
Safety Data Sheet (SDS).
Directions for use

Primer may be applied by spraying, brushing or dipping at
ambient temperature. Excess primer should be avoided.
Presence of primer may be detected by means of a UV
inspection lamp (365 nm). If polyolefin and more active or
easier to bond materials are involved, apply the primer to the
polyolefin only
Handling precautions

Primer must be handled in a manner applicable to highly
flammable materials and in compliance with relevant local
regulations. The solvent can affect certain plastics or coatings.
It is recommended to check all surfaces for compatibility before
Loctite Material Specification

LMS dated November-6, 2000. Test reports for each batch
are available for the indicated properties. LMS test reports
include selected QC test parameters considered appropriate to
specifications for customer use. Additionally, comprehensive
controls are in place to assure product quality and
consistency. Special customer specification requirements may
be coordinated through Henkel Quality.

Store product in the unopened container in a dry location.
Storage information may be indicated on the product container
Optimal Storage: 8 °C to 21 °C. Storage below 8 °C or
greater than 28 °C can adversely affect product properties.
Material removed from containers may be contaminated during
use. Do not return product to the original container. Henkel
Corporation cannot assume responsibility for product which
has been contaminated or stored under conditions other than
those previously indicated. If additional information is required,
please contact your local Technical Service Center or
Customer Service Representative.
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