Abstract: A method is herein disclosed for curing an organoalkoxysilane compound characterized by using as a catalyst at least one compound selected from the group consisting of a phosphite of the formula:(RO).sub.n P--OH).sub.3-nand a phosphate of the formula: ##STR1## (wherein R is an alkyl group having 1 to 4 carbon atoms and/or an aromatic group; n is an integer of 1 or 2).