Elastomer paint is a specialist coating product, often used to protect and seal exterior surfaces. Here’s everything you need to know about it:

How do you define elastomer paint?

Elastomer paint is formulated to be highly flexible, capable of stretching and contracting in response to temperature variations. This characteristic makes it ideal for surfaces exposed to the elements, such as facades, roofs or exterior walls. It is often used to prevent or treat cracks and improve the watertightness of surfaces.

elastomer paint - AI

How does elastomer paint work?

The secret of this paint lies in its high-quality acrylic resins, which enable it to form an elastic film on the painted surface. This provides a protective barrier against water, rain, wind and climatic variations, while allowing the surface to breathe. Once applied, the paint hardens to form a flexible membrane that maintains its integrity despite surface movement.

Types of elastomer paint

There are generally two types of elastomer paints:

  1. Acrylic elastomer paint: Ideal for moderate climatic conditions, it is durable and offers good UV resistance.
  2. Silicone elastomer paint: Better suited to extreme environments, it is more resistant to water and high temperatures.

Elastomer paint applications

This type of paint is mainly used for :

  • Facades: Protect exterior walls against water infiltration and damp.
  • Roofs: Improving the watertightness and weather resistance of roofs.
  • Concrete structures: Prevent cracks and damage caused by movement of materials.
Example of application to a roof using an airless pump

Example of application to a roof using an airless pump

Advantages of elastomer paint

  1. Flexibility: Its ability to follow surface movements makes it an excellent choice for materials subject to expansion or contraction.
  2. Waterproofing: It forms an effective barrier against water infiltration.
  3. Weather resistance: Elastomer paint is designed to last for years, even in harsh weather conditions.
  4. Durability: With proper maintenance, this type of paint retains its protective properties for up to a decade.

Elastomer wheel paint - AI

Disadvantages of elastomer paint

  1. Drying time: Elastomer paint can take several days to dry completely, depending on weather conditions.
  2. High cost: Compared with other types of paint, it is often more expensive.
  3. Demanding application: It is essential to prepare the surface well and apply the paint under optimum conditions to ensure maximum durability.

Tips for applying elastomer paint

  • Surface preparation: Clean and repair the surface before painting to ensure optimum adhesion.
  • Use of a sprayer: For uniform and rapid application, an airless sprayer is recommended (example: Graco Dutymax EH230 DI Procontractor – 24W942). This type of product often requires an airless nozzle between 0.027 and 0.033 inches in size.
  • Weather conditions: Apply the paint in dry weather and at a moderate temperature to avoid drying too quickly or too slowly.

Video example of Graco roof spraying, by SAMCO Painting and Decorating

Elastomeric paint is an excellent choice for those looking to provide lasting protection for their exterior surfaces against the elements. Although more expensive and demanding to apply, it offers incomparable benefits in terms of protection and longevity.

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