Breathable glossy sealant for concrete and masonry surfaces

摘要

A water-based concrete or masonry sealant includes an acrylic- or silicone-modified reaction product of an unsaturated drying oil and an alkyd, the reaction product being dispersed in aqueous solution; and a dispersion of metal salt catalyst in aqueous solution. A method of treating a previously sealed concrete or masonry substrate, includes the steps of: applying to the previously sealed concrete or masonry substrate a sealant comprising an acrylic- or silicone-modified reaction product of an unsaturated drying oil and an alkyd, the reaction product being dispersed in aqueous solution; an aqueous dispersion of metal salt catalyst, and water; and allowing the sealant to cure.

主权项

1. A method comprising:
providing a sealant coating from a sealant composition over an acrylic lacquer sealant on a concrete or masonry substrate; the sealant coating comprising an acrylic- or silicone-modified reaction product of an unsaturated drying oil and an alkyd, the reaction product being dispersed in aqueous solution; and an aqueous dispersion of metal salt catalyst; allowing the sealant coating to dry and cure without moisture; wherein the acrylic-modified or silicone-modified reaction product of the unsaturated drying oil and the alkyd is 20% to 80% by weight of the sealant composition prior to the drying and curing, and the unsaturated drying oil is present in an amount of 5 to 45% by weight of the sealant composition prior to the drying and curing; further comprising applying the composition in four coatings, wherein a surface of the coated concrete or masonry substrate after the four coatings exhibits less than 10% haze; and the surface of the coated concrete or masonry substrate after the four coatings has a minimum 20% surface gloss as measured by a gloss meter at a 60° specular angle.