The activator speeds up the curing process of WEICON Contact Cyanoacrylate Adhesives. When applied to absorbing surfaces, e.g. wood or foam etc., and all chemically-treated surfaces, e.g. zinc galvanized metals etc., the activator’s effectiveness lasts approx. one minute. On non-absorbent surfaces, the activator’s effectiveness lasts up to approx. 12 hours. Use is recommendable with: highly viscous WEICON Contact types, large thickness of the adhesive layer, absorbing and porous surfaces, passive materials (alkaline surfaces, like for example zinc coated metal parts), disadvantageous environmental conditions (low temperatures, low air humidity < 30%).