Acrylic roof coatings have been around since The 1950s and remain a smart choice in the commercial roof restoration industry. They are commonly used on a variety of roof systems including metal, modified bitumen, built-up roofs, EPDM, TPO, PVC, concrete, and spray polyurethane foam. Although acrylics are suitable for use on a variety of systems, they are highly recommended to only be used on steep-slope metal roofs where ponding water is not an issue. As a water-based material, acrylics do not hold up well to standing water.
Silicone Roof Coatings have taken over Acrylic as the most widely used coating material in modern commercial roof restoration. They are best known for their superior UV stability and resistance to ponding water. Silicones are a solvent-based material, meaning they are less susceptible to colder temperatures and therefore have a broader application window than water-based (acrylic) roof coatings.
Most of today’s silicone coating formulations have a solids content of 90% or greater, meaning that less liquid material is used during application to achieve the required dry film thickness.