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LOCTITE® SF 770 is a primer that accelerates bonding for polyolefins and other difficult-to-bond plastics and other low-surface tension surfaces. It is recommended to prime the surface with a LOCTITE® fast-curing adhesive to ensure that the prepared surface is primed for the curing of the LOCTITE® fast-curing adhesive. It is suitable for difficult-to-bond materials, including polyethylene, polypropylene, polytetrafluoroethylene (PTFE), and thermoplastic elastomers. LOCTITE SF 770 is not recommended for applications requiring high peel strength.