Composition and method of sealing and protecting asphalt shingles or other porous roofing and construction materials
Sealing compositions and application methods for sealing and protecting asphalt roof shingles or other porous roofing and construction materials are described for eliminating algae, mold and mildew, increasing granular adhesion, providing additional UV protection and significantly increasing the wind resistance of the roof or other construction material. The sealing composition includes an acrylic polymer that has been modified by a silicone surfactant to alter its wetting properties so as to promote wicking of the sealer under asphalt shingles and at open edges to prevent curling and water infiltration. The method of applying the sealing composition promotes uniform distribution of the product on the surface of installed roofs as well as enhances bonding between individual shingles by improved penetration on and between shingle layers to increase adhesion area.
1. A composition for sealing and protecting at least one asphalt shingle or other porous construction materials consisting essentially of:
(a) about 20% by weight to about 28% by weight of an acrylic polymer;
(b) about 0.01% by weight to about 4% by weight of a silicone surfactant;
(c) about 0.001% by weight to about 4% by weight of a UV inhibitor; and
(d) about 0.001% by weight to less than 0.06% by weight of a biocide, with the remainder being water,
wherein the remain the composition contains about 20% to about 30% solids by weight, the UV inhibitor is 2-Hydroxy-4-n-octyloxybenzophenone, the biocide is copper sulfate, and all weight percentages are based on a total weight of the composition.
2. The composition of claim 1 wherein the acrylic polymer is an acrylic/vinyl co-polymer.
3. The composition of claim 1 wherein the silicone surfactant is polydimethylsiloxane.
4. A composition for sealing and protecting at least one asphalt shingle or other porous construction material comprising about 20% by weight to about 28% by weight of an acrylic/vinyl co-polymer, about 0.01% by weight to about 4% by weight of a silicone surfactant, about 0.001% by weight to about 4% by weight of a UV inhibitor, about 0.001% by weight to less than 0.06% by weight of a biocide, with the remainder being water, wherein the composition has a surface tension of about 15 to 30 dynes/cm as measured between the composition and an asphalt shingle, the composition wicks into and impregnates 20% to about 99% of a surface area of the shingle, the UV inhibitor is 2-Hydroxy-4-n-octyloxybenzophenone, the biocide is copper sulfate, and all weight percentages are based on a total weight of the composition.
5. A method for sealing at least one asphalt shingle or other porous construction materials comprising:
a) Formulating a coating composition consisting essentially of about 20% by weight to about 28% by weight of an acrylic polymer, about 0.01% by weight to about 4% by weight of a silicone surfactant, about 0.001% by weight to about 4% by weight of a UV inhibitor, and about 0.001% by weight to less than 0.06% by weight of an biocide, with the remainder being water, wherein the UV inhibitor is 2-Hydroxy-4-n-octyloxybenzophenone, the biocide is copper sulfate, and all weight percentages are based on a total weight of the composition;
b) Applying the coating composition to the shingle or other porous construction material to achieve a dried thickness of about 2 to 6 mils.
6. The method of claim 5 wherein step b) is completed by applying a single coat of the composition.
7. The method of claim 5 wherein step b) is completed by applying a first, thicker coat, allowing the first coat to dry and impregnate the shingle, and subsequently applying a second coat.
8. The method of claim 5 wherein the coating is applied to achieve a desired dried thickness of about 4 mils.
9. The method of claim 5 wherein the coating is applied at a wet thickness of about 6 to 10 mils to achieve the desired dried thickness.
10. The method of claim 5 further including prior to step b), washing the asphalt shingle or other construction material.
11. The method of claim 5 wherein step b) is completed by using an airless sprayer.
12. The method of claim 5 wherein step b) further includes applying the composition at a rate of about 75 ft 2 per gallon to about 125 ft 2 per gallon.
13. The method of claim 5 wherein step b) further includes applying the composition at a rate of about 100 ft 2 per gallon.
14. The method of claim 5 wherein the composition in step a), the acrylic polymer is an acrylic/vinyl co-polymer and the silicone surfactant is polydimethylsiloxane.
15. The composition of claim 1 wherein the composition as applied to an asphalt shingle has a surface tension of about 15 to 30 dynes/cm.
16. The composition of claim 1 wherein the composition as applied to an asphalt shingle wicks into and impregnates at least about 30% of a surface area of the shingle.
17. The composition of claim 4 further comprising ethylene glycol methyl butyl ether.