Fast drying primer for adhesion of IKO Easyseal Self-Adhesive Bitumen Roofing Membranes IKOpro IKO Easyseal Bonding Agent IKOpro IKO Easyseal Bonding Agent is a fast drying primer. The solvent based primer, based on synthetic rubber and resins is specially formulated to activate self-adhesive bitumen roofing membranes to promote a strong bond even at low temperatures.