EC-3909 is a structural adhesive primer compatible with many epoxy or nitrilephenolic based adhesive films. Among those for example AF 30, AF 3109-2 and AF500. The primer has been designed for improved adhesion to anodized aluminium. It offers the following advantages : · Insures complete wetting of film adhesive to adherend surface. · Protects surface treated metals and diminish strongly the rate of natural re-oxidation. · Improves shear and peel performance, on both etched and anodized surfaces. · Results in superior environmental performance. · Simplifies production scheduling by protecting the cleaned surfaces until bonding operation can be completed. · Primer can be co-cured with heat curing film or 1-part paste adhesives.