Shingles with increased hydrophobicity
A shingle includes a substrate having an asphalt coating on a top surface of the substrate and on a bottom surface of the substrate. A surface layer of granules is embedded in the asphalt on the top surface of the substrate. A backdust layer of particles is embedded in the asphalt on the bottom surface of the substrate. A sealant is disposed on the backdust. A hydrophobic material is applied to the sealant.
1. A shingle, comprising:
a substrate having a first asphalt coating on a top surface of the substrate and a bottom surface of the substrate;
a surface layer of granules embedded in the asphalt on the top surface of the substrate;
a backdust layer of particles embedded in the asphalt on the bottom surface of the substrate;
a sealant layer comprising a top surface and a bottom surface, wherein the top surface abuts the backdust layer; and
a hydrophobic coating applied to the bottom surface of the sealant layer.
2. The shingle of claim 1 , wherein the hydrophobic coating is an oil.
3. The shingle of claim 1 , wherein the hydrophobic coating is a wax.
4. The shingle of claim 1 , wherein the hydrophobic coating is a wax emulsion.
5. The shingle of claim 1 , wherein the hydrophobic coating is a silicone.
6. The shingle of claim 1 , wherein the hydrophobic coating is a siloxane.
7. The shingle of claim 1 , wherein the hydrophobic coating is a silane solution.
8. The shingle of claim 1 , wherein the hydrophobic coating is a methyl silane solution.
9. The shingle of claim 1 , wherein the hydrophobic coating is an acrylic resin.
10. The shingle of claim 1 , wherein the hydrophobic coating is applied to both the backdust and the sealant.
11. The shingle of claim 1 , wherein the hydrophobic coating is applied to the backdust layer and the sealant layer around a perimeter of the shingle.
12. The shingle of claim 1 , wherein the contact angle of the sealant layer with the hydrophobic coating is greater than 70 degrees.
13. The shingle of claim 1 , wherein the hydrophobic coating comprises Titanium mineral particles.
14. The shingle of claim 1 , wherein the hydrophobic coating is applied to the entire bottom surface of the sealant layer.
15. The shingle of claim 1 , wherein the hydrophobic coating is applied to the entire bottom surface of the substrate.
16. The shingle of claim 1 , wherein the hydrophobic coating is sprayed on the bottom surface of the sealant layer.
17. The shingle of claim 1 , wherein the hydrophobic coating is rolled on the bottom surface of the sealant layer.