PURPOSE: To make the adhesion of concrete hard to develop and the removal of the concrete easy even when the concrete adheres by a method wherein composition, which essentially composed of aqueous resin emulsion, alkali-soluble resin, wax, multivalent metal compound and water, is applied to metal concrete form and form supporting strut.

CONSTITUTION: Water-soluble emulsion is preferably made of polymer of ethylene-based unsaturated compound containing 1-20wt.% of α,β-mono-ethylene- based unsaturated compound. Preferably, alkali-soluble resin content is 5-50wt.% of the resin content A in the water-soluble emulsion, wax content C is 2-90wt.% of the sum of A and B, multivalent metal compound is 1-40wt.% of the sum of A, B and C. The amount of water is determined in consideration of handling properties. By applying the composition, adhered concrete can be easily peeled off and strongly adhered concrete can be removed together with coating film with alkali water solution.