Abstract: A coating composition comprising from 5-15% by weight prolamine, from 5 to 15% by weight surfactant and from 70-90% by weight water is provided along with methods of sizing substrates. Particularly preferred are compositions further comprising glyoxal or other crosslinking agents. Also provided are coating compositions comprising from 5 to 30% surfactant by weight with water and an antifoam agent and further comprising a carbohydrate The compositions are optionally applied with additional coating ingredients including carbohydrates including starches as well as binders, minerals and pigments and antifoam agents.