Elastomeric Coatings
An elastomeric coating is roofing applied in a viscous state. It has elastic properties, and can stretch in the summertime heat and then return to their original shape without damage.
Elastomeric coatings are very effective in solving roof leaks and can be used to restore virtually all types of roofs.
Elastomeric coatings usually contain polymeric materials, such as acrylic, and a white pigment, such as titanium dioxide, to make them opaque and reflective. An elastomeric roof coating is applied thicker than paint.
Types of Elastomeric Coatings
Acrylic Elastomeric Coatings – This is most widely used roof coating. Acrylic elastomeric roof coatings may be used over positively sloped roof surfaces. The combination of longevity, easy clean up and environmental friendliness makes this coating the #1 choice.
Butyl Elastomeric Coatings – The roof coating of choice for flat (low slope) roofs such as asphalt built up (BUR), modified bitumen (APP and SBS) and single ply roofing such as PVC and TPO. It has ponding water resistance and is ideal for applications requiring a vapor barrier.- Polyurethane Elastomeric Coatings – Recommended for use on EPDM rubber roofs without the need for high-pH rinses. It may also be used on modified bitumen and single ply roofing such as PVC and TPO.
- Silicone Elastomeric Coatings – A popular protective coating for polyurethane foam because of its exceptional weathering characteristics. Commonly used over newly installed sprayed polyurethane foam and can also be used to recoat an existing silicone coated roof.
Water based or Solvent based?
Water based elastomeric coatings are easy to use and clean up. Solvent based elastomeric coatings provide greater ponding water resistance and is commonly used over flat (low slope) roofs.
Installation Options
The long term performance of elastomeric coatings largely depends on the attention to detail during the preparation and waterproofing stages. Elastomeric coatings are easy to apply. A small, simple roof can be successfully restored by the building owner with nothing more than a brush or roller. Large, complicated roofs best left to experienced roof coating contractors with specialized equipment.