3M Aerospace’s range of core splice film adhesives expand to fill mismatched surfaces, splicing (or joining) the internal honeycomb structures together or giving a toughened edge finish. The majority of these films are supplied in sheets as opposed to rolls, and vary in thickness from 25mil to 50 mil. Unlike standard epoxy film adhesives, there is no choice of scrim, but their expansion properties increase bond strength in difficult to match applications.
Most 3M film adhesives require refrigerated or freezer storage to maintain their properties. However, 3M Scotch-Weld AF 3074 FST is an innovative product and the first known core splice film that can be stored at room temperature. This increases the air freight options available, and can be stored in locations without refrigeration available.
3M Scotch-Weld Structural Adhesive Bonding Primers help prepare surfaces for bonding; improving conditions so the adhesives are more effective and create stronger, longer lasting bonds. All primers can be sprayed, bushed or applied by a roller, and the options available are below: