Exterior Painting: The Benefits of Elastomeric Coating

exterior painters in VancouverElastomeric coating is great for a number of purposes, such as fixing roof leaks, restoring roofs, and for refurbishing stucco. It’s not really considered a kind of paint, but rather, as the name implies, a type of coating. For one, its texture is different from that of paint; it’s thicker, more elastic and more “spreadable.” Due to this thickness and its overall resilience, elastomeric coating also last up to twice as long as regular paint. It can fill in pores, small pits and hairline cracks that may collect dust particles—things that regular paint can’t do as effectively. If these microscopic cracks are not filled, they may serve as a breeding ground for mold spores, mildew and algae.

Elastomeric coating can stretch out in the summer heat but easily returns to its former shape without damage. In addition, since the product contains internally plasticized elastic polymers, it can bridge cracks permanently, preventing new cracks from damaging the elastic surface coating.

Types of Elastomeric Coating

An elastomeric coating is usually made of polymeric ingredients, such as titanium oxide and acrylic, to make it cloudy and reflective. There are several types of coatings available:

1. Acrylic
This type of coating is often used for sloped roof surfaces. It is the most common kind of coating used and is usually the top choice of painters. It’s easy to clean up, long lasting, and eco-friendly.

2. Butyl
This kind of coating is popular for low slope or flat roofs like single ply roofs (PVC and TPO), modified bitumen roofs (SBS and APP), and asphalt built up (BUR). Butyl contains ponding water resistance, making it ideal for applications that need a vapor barrier.

3. Polyurethane
Polyurethane coating is recommended for EPDM rubber roofs. However, it is also used for modified bitumen roofs and single ply roofs like TPO and PVC.

4. Silicone
Silicone is commonly used on polyurethane foam due to its excellent weather-resistant characteristics. It is also used for applying a fresh coat of protection on a surface already coated with silicone.

Benefits of Elastomeric Coating for Exterior Painting

exterior paintingUsing elastomeric coating has several benefits. It’s sold in custom colours, is breathable, waterproof and environmentally friendly. In addition, these coatings help to prevent substrate damage, moisture build-up and rain from penetrating home exteriors.

It can also be used on a wide variety of materials, such as stucco, brick, masonry and concrete, so it’s the perfect go-to material for many exterior painting projects. To ensure that the application of an elastomeric coating to your home is done correctly, it’s best to hire a painting expert to clean and prepare the surface, and then ensure that the application process is carried out properly, in particular to guard against the presence of “pinholes,” trapped air escaping in the form of tiny bubbles that can occur in application.

The techniques used by professional painters will guard against the pinhole pitfall, ensuring that the homeowner receives the full benefit of elastomeric coating as a continuous waterproof membrane.


Vancouver painter and contractor Peter Byrne“PETER BYRNE is the owner and hands-on manager of Kassel Painting Limited. In the last two decades he has run over 1500 painting projects totaling millions of dollars. There is little that can go right (or wrong) on a job-site he has not seen, solved, and lived to talk about.”

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