Henry® Company has secured a patent for its Dirt Pick-Up Resistance (DPUR) formula, which provides its Pro-Grade® 988 Silicone White Roof Coating with greater resistance to discoloration from airborne particulates.

The United States Patent and Trademark Office recently awarded patent protection to Henry’s DPUR technology. The U.S. Patent No. 11,680,171, to Zhu et al., is the first patent of many more to come for roofing and building envelope technology from Henry® Company. 

Pro-Grade 988 Silicone White Roof Coating offers a high-quality solution for roof protection. This innovative system consists of a single-component, moisture-curing silicone rubber coating that is completely free of solvents. Even though they offer the same reflectivity as acrylic roof coatings when first installed, conventional silicone roof coatings tend to attract and retain particulates on the surface, which will diminish reflectivity with accumulation.  The DPUR formula in Pro-Grade 988 Silicone White Roof Coating, however, resists particulates and is self-cleaning when exposed to water. 

“The patented DPUR technology is yet another example of Henry Company’s drive for innovation in response to the needs of roofing contractors and building owners,” said John Dobson, SVP, R&D and Quality, at Henry Company. “With DPUR technology, Henry Pro-Grade® 988 Silicone White Roof Coating maintains its reflectivity, even with repeated exposure to dust and dirt. It also continues to outperform silicone roof coatings for waterproofing, ease of installation and environmental sustainability.”

The patent is for a DPUR formula that includes polysiloxane, a silicone polymer that reduces dust attraction, and a surfactant, which features a self-cleaning property that is activated when exposed to rain. The surfactant, which reduces the surface tension between a liquid and a solid, a gas or another liquid, also features a detergent that is chemically tethered to the silicone to reduce leaching. The formulation makes Pro-Grade 988 Silicone White Roof Coating resistant to discoloration, which extends the life of its reflectivity and reduces the frequency of maintenance and replacement. 

In addition to reflectivity that is comparable to that of acrylic roof coatings, Pro-Grade 988 Silicone White Roof Coating surpasses acrylic roof coatings in waterproofing, especially where ponding water is present. It also saves installation time as it requires the application of only one coat, as compared with acrylic roof coatings that require a base coat and a top coat. 

Another labor-saving advantage that Pro-Grade 988 Silicone White Roof Coating has over acrylic roof coatings is its rain readiness, which is its tolerance to water exposure during the curing process. Acrylic roof coatings must dry to cure properly, which is a process that can last as long as 24 hours. If there is rain after the coating is installed but before it has time to complete curing, rainwater can wash it away. Pro-Grade 988 Silicone White Roof Coating, on the other hand, reacts with moisture as it cures and will dry in as little as 15 minutes.

“DPUR technology enables Pro-Grade 988 Silicone White Roof Coating to save contractors installation time and owners energy costs,” Dobson said. “Only Henry Company can provide a silicone roof coating that offers excellent waterproofing performance, simple installation and high emissivity to keep interiors cool and reduce heating and cooling demands for a better performing building.”

For more information about Henry Pro-Grade® 988 Silicone White Roof Coating with Dirt Pick-Up Resistance (DPUR) Technology, visit www.henry.com or call 1-800-486-1278.