To keep the cooling power, an elastomeric cool roof coating has to stay clean. This is where our Levasil CC products that enhance the anti-soiling properties have a key role to play.

In warm and sunny areas of the world, the use of elastomeric cool roof coatings with high solar reflecting properties is becoming more and more popular to reduce the need for air conditioning and to keep energy consumption down.

Elastomeric cool roof coatings are prone to dirt pick-up due to their tacky nature. Anti-soiling or DPUR (dirt pick-up resistance) is therefore a key parameter to be able to utilize the high solar reflecting properties of the cool roof coating. A simple solution to this is to add Levasil CC, our silane-modified colloidal silica, which significantly enhances the DPUR properties of the coating by reducing the tackiness.

It is also important that the coating firmly adheres to the substrate and expands and contracts with it upon temperature changes in order to also seal and waterproof the roof. The addition of colloidal silica improves adherence and mechanical properties of the coating without sacrificing coating elasticity and flexibility.

Using Levasil CC in elastomeric cool roof coating does not affect total solar reflectance (TSR) or cause any degradation of the coating film. Thanks to the self-cleaning properties of Levasil CC, you get a cool roof coating that lasts longer.

Levasil CC can also be used in combination with Expancel Microspheres. You can read more about it in the article below.

Article published in CoatingsTech January 2019

Benefits of Levasil Colloidal Silica in elastomeric cool roof coatings

Levasil CC and Levasil CT application areas within coatings