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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 sea

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.

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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 dis

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. 2. The method of claim 1, wherein the concrete or masonry substrate is an outdoor patio; the concrete or masonry substrate includes pigment, metal stearates or both; or the concrete or masonry substrate is an outdoor patio that includes pigment or metal stearates or both. 3. A sealant composition for masonry or concrete that forms a coating or film, the sealant composition consisting of: 20% to 80% by weight of the sealant composition of an aqueous dispersion of an acrylic-modified or silicone-modified reaction product of an unsaturated drying oil and an alkyd, and water is 20 to 80% by weight of the aqueous dispersion, and the unsaturated drying oil is present in an amount of 5 to 45% by weight of the sealant composition;1 to 40% by weight of the sealant composition of a self-crosslinking acrylic emulsion;a dispersion of metal salt catalyst in aqueous solution;an additional amount of water in an amount of 20% to 70% by weight of the sealant composition;a water repellent or water resistance enhancer component including a silane and/or siloxane oligomer;0.001 to 5% by weight of the sealant composition of a catalyst accelerator;a halogenated polymer present in an amount of 1 to 25% by weight of the sealant composition;one or more of the following: a wetting agent, an anti-skin agent, a defoamer, and a coalescent in an amount of 0.001 to 3% by weight of the sealant composition, and leveling agent in an amount of 0.001 to 5% by weight of the sealant composition;a co-solvent present in an amount of 0.001 to 10% by weight of the sealant composition;optionally, a freeze-thaw agent in an amount of 0.001 to 3% by weight of the sealant composition;a biocide present in an amount of 0.001 to 5% by weight of the sealant composition;optionally, a UV absorber in an amount of 0.001 to 5% by weight of the sealant composition;a base, present in an effective amount to provide a basic pH to the sealant composition. 4. The method of claim 1, wherein the sealant composition further comprises a halogenated polymer. 5. The method of claim 1, wherein the unsaturated drying oil is a medium oil. 6. The sealant composition of claim 3, wherein the sealant composition has a viscosity of 25 cps to 150 cps. 7. The sealant composition of claim 3, wherein the unsaturated drying oil is a medium oil.