The present disclosure relates to a composition comprising: (a) at least one polyacid; (b) at least one amino compound chosen from alkyl monoamines, alkoxylated polyamines, alkoxylated monoamines, polyamines and mixtures thereof; and (c) cosmetically acceptable carrier. The present disclosure also relates to a method of sealing the surface of a keratinous substrate using such compositions, including inhibiting loss of hair color. The compositions of the present disclosure may further comprise an auxiliary ingredient.