A composition for controlling air in hydratable cementitious compositions, comprising: (A) at least one agent operative to entrain air in a hydratable cementitious composition, said at least one agent comprising a trialkanolamine comprising at least one C 3 -C 5 hydroxyalkyl group, a lignosulfonate, a naphthalene sulfonate, a melamine sulfonate, an oxyalkylene-containing superplasticizer, an oxyalkylene-containing shrinkage reducing agent, or mixture thereof; (B) a polyalkoxylated polyalkylene polyamine defoamer obtainable by alkoxylating a polyalkylene polyamine with propylene oxide, or a mixture thereof with ethylene oxide, wherein the amount of ethylene oxide groups is in the range of 0%-40% based on total weight of the polyethers, and the amount of polypropylene oxide groups is in the range of 60%-100% based on total weight of the polyethers, the molar ratio of propylene oxide to ethylene oxide being greater than 1; the polyalkoxylated polyalkylene polyamine defoamer having a structure represented by Formula or salt thereof, or combination of said defoamer and salt thereof, wherein each of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 independently represents a hydrogen, C 1 -C 4 alkyl group, -CH 2 -OH, or -(AO) x -R 8 , and wherein at least one of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 represents -(AO) x -R 8 , wherein AO represents propylene oxide ("PO") or a mixture of PO and ethylene oxide ("EO"), wherein the molar ratio of PO to EO is at least 100:0 to 100:90; x represents an integer of 4 to 100; and R 8 represents hydrogen or an alkyl group; n represents an integer of 0 to 100; and wherein, if n is 0 then the amount of EO is less than 10% by weight based on total weight of said polyalkoxylated polyalkylene polyamine defoamer; and (C) the ratio of component A to component B is in the range of 5 to 100 by dry weight. (A) at least one agent operative to entrain air in a hydratable cementitious composition, said at least one agent comprising a trialkanolamine comprising at least one C 3 -C 5 hydroxyalkyl group, a lignosulfonate, a naphthalene sulfonate, a melamine sulfonate, an oxyalkylene-containing superplasticizer, an oxyalkylene-containing shrinkage reducing agent, or mixture thereof; (B) a polyalkoxylated polyalkylene polyamine defoamer obtainable by alkoxylating a polyalkylene polyamine with propylene oxide, or a mixture thereof with ethylene oxide, wherein the amount of ethylene oxide groups is in the range of 0%-40% based on total weight of the polyethers, and the amount of polypropylene oxide groups is in the range of 60%-100% based on total weight of the polyethers, the molar ratio of propylene oxide to ethylene oxide being greater than 1; the polyalkoxylated polyalkylene polyamine defoamer having a structure represented by Formula or salt thereof, or combination of said defoamer and salt thereof, wherein each of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 independently represents a hydrogen, C 1 -C 4 alkyl group, -CH 2 -OH, or -(AO) x -R 8 , and wherein at least one of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 represents -(AO) x -R 8 , wherein AO represents propylene oxide ("PO") or a mixture of PO and ethylene oxide ("EO"), wherein the molar ratio of PO to EO is at least 100:0 to 100:90; x represents an integer of 4 to 100; and R 8 represents hydrogen or an alkyl group; n represents an integer of 0 to 100; and wherein, if n is 0 then the amount of EO is less than 10% by weight based on total weight of said polyalkoxylated polyalkylene polyamine defoamer; and (C) the ratio of component A to component B is in the range of 5 to 100 by dry weight. <EOS>