Adhesion promoter for ARA® silicone and hybrid sealants and adhesives on porous or absorbent substrates. Adhesion optimisation in joints subject to high expansion, improvement of load-bearing capacity of porous substrates, barrier against capillary moisture on bonding surfaces, separating
layer against undesired interactions between sealant and substrate. Reactive, film-forming adhesion promoter for ARA® hybrid sealants. ARA® Primer P
penetrates into the pores of the substrate in liquid state. Reacts with moisture to form an insoluble, water- and alkali-resistant resin film that adheres to the substrate and additionally anchors itself in the pores.