Patent ID: 7705072

Claim:
A moisture resistant concrete coating composition comprising: 20% to 30% by weight, based on the weight of the coating composition, of a water dispersible resin having a non-volatile materials content in the range of 40% to about 60%, an average particle size in the range of 80 nm to 400 nm, and a glass transition temperature in the range of −10° C. to 40° C.; 0.1% to 0.50% by weight, based on the total weight of the coating composition, of an alkoxysilane; 3.0% to 15% by weight, based on the total weight of the coating composition, of a mineral aggregate, said mineral aggregate comprising: between 7% and 15% by weight silica, based on the total weight of the mineral aggregate, having a mesh size of 40 or less, and between 10% to 90% by weight silica, based on the total weight of the mineral aggregate, having a mesh size of 40 to 270, and less than 1% by weight of silica having a mesh size of 270 or more; and 25% to 55% by weight, based on the total weight of the coating composition, of an extender composition, said extender composition comprising: 4.0% to 8.0% by weight, based on the total weight of the extender, of at least one silica, wherein at least one silica has an average particle size in the range of 1 micron to 15 microns; 7.0% to 12.0% by weight, based on the total weight of the extender, of a silicate, wherein the silicate has an average particle size in the range of 1 micron to 40 microns; and 10% to 20% by weight, based on the total weight of the extender, of a second silica, wherein the second silica has an average particle size in the range of 1 micron to 110 microns.