LOCTITE SF 770 is a polyolefin primer for surface preparation and is ideal for use with difficult-to-bond plastics. LOCTITE SF 770 is a primer used to make polyolefin and other low-energy surfaces suitable for bonding with LOCTITE instant adhesives. 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. Improves adhesion of instant adhesives to polyolefins and other low surface energy plastics Only for difficult-to-bond plastics IMPORTANT NOTE: This product was upgraded in 2021/2022. Please utilize the product IDH/item number to ensure correct SDS is downloaded.