A curable composition at room temperature comprising (A) 100 parts by weight of a hydrolyzable silyl group-containig vinyl polymer, (B) 0.1 to 100 parts by weight of a specific silane compound and (C) 0 to 20 parts by weight of a curing catalyst, the silane compound (B) being a silane compound selected from <CHEM> The composition is excellent in not only adhesion to melamine alkyd or melamine acrylic resin coatings but also hardness, solvent resistance and staining resistance.
