ABA READYFIX-W adheres to all solid, load-bearing, clean, dry and moist surfaces free of substances which can cause separation. Remove any coatings with inadequate bonding strength. Depressions of up to 5mm depth can be repaired with ABA READYFIX-W the day before. Prime absorbent substrates such as calcium sulfate screeds, lightweight concrete, plasterboards and gypsum plasters, sandwich type and fibrous plasterboards with E.M.BOND. Allow the priming coat to dry for approx. 4 hours.