Clear intumescent coatings were developed to allow for presentation of the natural wood visual, but have struggled to achieve an acceptable E84 Class A rating, while also having a plastic-type look to the visual. Many of the current clear, intumescent coatings require application of a solvent topcoat to prevent moisture from contacting the base coating, and/or creating a visual that has some haziness to it. Armstrong World Industries has developed a patent pending novel, clear fire retardant waterborne coating system that has consistently achieved Class A (25 flame spread index/50 smoke developed index) rating with the ASTM E84 Tunnel Test on solid wood substrates, while still presenting a true wood visual. Armstrong’s patent pending, new Class A clear coating system is a significant development in the fire- retardant coatings market for wood substrates. This technology was approved in a manufacturing environment.
Journal: TechConnect Briefs
Volume: TechConnect Briefs 2019
Published: June 17, 2019
Pages: 82 - 85
Industry sector: Advanced Materials & Manufacturing
Topicss: Advanced Materials for Engineering Applications, Materials Characterization & Imaging