Liquid Waterproofing Membrane
Binders are usually made of an organic compound or silicone compound. Most binders are elastic polymers with elongation and tensile characteristics, or elastomers, which have the ability to return to their original shape after being stretched or deformed. In white coatings, the elastomer binder is the viscous, pliant material that bonds the pigments and makes them adhere to the surface.
Permeability of Water-Proof Roof Options
Many white coatings are waterproof but some are not. The property of permeability (perm rating) to liquid water, water vapor, and gases varies greatly, depending on the type of coating.
- Acrylic coatings are breathable, which means they have a high moisture vapor transmission rate or permeability.
- Silicone coatings are also classified as breathable types
- Butyl rubbers, hypalons, and neoprenes have a very low permeability, i.e., they are highly resistant to moisture transmission.