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What Is An Elastomeric Coating?

Updated: Feb 2

An elastomeric coating can be stretched to twice its original length (100% extension) and then recovered to its original dimensions.

Commercial roofing uses elastomerics as a liquid that is applied to an existing roof system to create a membrane. They are also used to make roofs.

  • Waterproof

  • Monolithic layer

  • Cooler by adding a bit of sun reflectivity

  • Have a longer life expectancy

  • You have a 10- to 20-year warranty


What are the THREE TYPES of ELASTOMERIC COATINGS?

Acrylic, silicone, or urethane are the most common types of elastomeric coats.

Acrylic is a water-based coating for roofs that have a slope. Acrylic roofs with standing water, meaning that the water does not drain off the roof, will cause the coating to turn back into a fluid and eventually be washed off.

Acrylics typically contain 52% solids per volume and 48% water. This means that almost half the product is lost to evaporation. Acrylic coatings are cheaper than other elastomeric products, but you will need to use more product to compensate for the loss of product during evaporation.

Silicone - This silicone resin-based coating has 96% solids and 4% carrier. This means that 96% of the roof's water will remain on it. Because they are resistant to ponding water, silicones work well on flat roofs. Silicones are an affordable coating that offers both performance and value.

While silicones are twice as weather-resistant as acrylics they are also more expensive.

Urethane - Urenes have the highest impact resistance among all elastomeric roof coverings. Urethanes, however, are more expensive than the others and don't stand up to standing water well.


Why do home owners install elastomeric roof coatings?

Elastomeric roof coatings offer attractive options for many reasons.

  • It is more economical than tearing down your roof completely

  • White will increase reflectivity, which will reduce energy costs.

  • It is a quick installation

  • It seals leaks, and gives your roof a monolithic waterproofing layer.

  • It gives the home owner a 10-20-year warranty

  • It is considered maintenance and/or repairs and does not count as another roofing layer

When should a home owner consider installing an elastomeric roof coating?

It is best to apply an elastomeric coat over your existing roof before it begins experiencing significant performance problems.

We mean issues if there are small leaks or flashings that show signs of wear, or if your rubber seams have begun to loosen.


A rubber roof with a 10-year warranty is a good example. The rubber roof will still be in great shape even if the warranty expires after 11 years.

It's a good time to apply a coating, as there is probably very little moisture under the seams. A roofing contractor can clean the roof and treat the seams before applying coating.

The cost of the project will be much lower than it would have been if the roof was in worse shape.


For more information please contact Roofing Wise (833) 315-7663