A water-free grout composition comprising: 0.1 - 4 wt. % of an alkoxysilyl-terminated, urethane-group-containing polymer component of the formula: Y-[(CR 1 2) b -SiR a (OR 2) 3-a] x, wherein Y is an x-valent polymer radical bonded via nitrogen, oxygen, sulfur, or carbon, R is identical or different monovalent, optionally substituted, SiC-bonded hydrocarbon radical, R 1 is identical or different, and is a hydrogen or a monovalent, optionally substituted hydrocarbon radical, optionally bonded to carbon via nitrogen, phosphorus, oxygen, sulfur, or carbonyl group, R 2 is identical or different, and is a hydrogen or a monovalent, optionally substituted hydrocarbon radical, x is an integer from 1 to 10, a is identical or different and is 0, 1, or 2, b is identical or different and is an integer from 1 to 10; 0.1 - 30 wt. % of silicone resin component consists exclusively of units of the formula R 3 c(R 4 O) d SiO (4,c,d)/2, wherein R 3 is identical or different, and is a hydrogen or a monovalent, SiC-bonded, optionally substituted hydrocarbon radical, R 4 is identical or different, and is a hydrogen or a monovalent, optionally substituted hydrocarbon radical, c is 0, 1, 2, or 3, and d is 0, 1, 2, or 3, wherein the sum of c+d ≤ 3 and in at least 50% of the units of the formula c = 0 or 1, and wherein at least 10 % of all units of formula have at least one Si-C-bonded phenyl group; 0.1 - 3 wt. % of surfactant(s); 50 - 95 wt. % of aggregate; and optionally: 0 - 5 wt. % of alkoxy silane(s); 0 - 5 wt. % of catalyst(s); 0 - 5 wt. % of additives; 0 - 5 wt. % of adhesion promoters; and 0 - 5 wt. % of water scavengers. 0.1 - 4 wt. % of an alkoxysilyl-terminated, urethane-group-containing polymer component of the formula: Y-[(CR 1 2) b -SiR a (OR 2) 3-a] x, wherein Y is an x-valent polymer radical bonded via nitrogen, oxygen, sulfur, or carbon, R is identical or different monovalent, optionally substituted, SiC-bonded hydrocarbon radical, R 1 is identical or different, and is a hydrogen or a monovalent, optionally substituted hydrocarbon radical, optionally bonded to carbon via nitrogen, phosphorus, oxygen, sulfur, or carbonyl group, R 2 is identical or different, and is a hydrogen or a monovalent, optionally substituted hydrocarbon radical, x is an integer from 1 to 10, a is identical or different and is 0, 1, or 2, b is identical or different and is an integer from 1 to 10; Y is an x-valent polymer radical bonded via nitrogen, oxygen, sulfur, or carbon, R is identical or different monovalent, optionally substituted, SiC-bonded hydrocarbon radical, R 1 is identical or different, and is a hydrogen or a monovalent, optionally substituted hydrocarbon radical, optionally bonded to carbon via nitrogen, phosphorus, oxygen, sulfur, or carbonyl group, R 2 is identical or different, and is a hydrogen or a monovalent, optionally substituted hydrocarbon radical, x is an integer from 1 to 10, a is identical or different and is 0, 1, or 2, b is identical or different and is an integer from 1 to 10; 0.1 - 30 wt. % of silicone resin component consists exclusively of units of the formula R 3 c(R 4 O) d SiO (4,c,d)/2, wherein R 3 is identical or different, and is a hydrogen or a monovalent, SiC-bonded, optionally substituted hydrocarbon radical, R 4 is identical or different, and is a hydrogen or a monovalent, optionally substituted hydrocarbon radical, c is 0, 1, 2, or 3, and d is 0, 1, 2, or 3, wherein the sum of c+d ≤ 3 and in at least 50% of the units of the formula c = 0 or 1, and wherein at least 10 % of all units of formula have at least one Si-C-bonded phenyl group; R 3 is identical or different, and is a hydrogen or a monovalent, SiC-bonded, optionally substituted hydrocarbon radical, R 4 is identical or different, and is a hydrogen or a monovalent, optionally substituted hydrocarbon radical, c is 0, 1, 2, or 3, and d is 0, 1, 2, or 3, 0.1 - 3 wt. % of surfactant(s); 50 - 95 wt. % of aggregate; 0 - 5 wt. % of alkoxy silane(s); 0 - 5 wt. % of catalyst(s); 0 - 5 wt. % of additives; 0 - 5 wt. % of adhesion promoters; and 0 - 5 wt. % of water scavengers.