MFM Building Products, a 100% employee-owned manufacturer of a full envelope of waterproofing and weather barrier products for the building industry, recently achieved a Class A Fire Rating for use with Class A standard 3-tab and architectural asphalt shingles per ASTM E108/ICC-ES AC188.

Ultra HT is a 45-mil, self-adhered roofing underlayment for use in steep-slope roofing and reroofing installations. The product features a durable cross-laminated polyethylene top film with a traction coating for excellent walkability. The specially formulated mastic is high-temperature rated to 250 degrees Fahrenheit for use under metal and tile applications. 

In August 2024, Ultra HT received a UL Listing as a Class A fire-resistant barrier when used in conjunction with 24 GA minimum steel or 16 oz. copper UL listed roofing panels per UL 790. For complete details on roof assemblies for either application, please visit the company’s website.

In addition, Ultra HT Wind & Water Seal is tested to ASTM D 1970, Florida Building Code FL #11842.3, Miami-Dade County Approved, ICC-ES ESR-1737, LA County (LARC/LABC), State of California (CRC/CBC), Texas Department of Insurance Listed, Fortified Building Program listed, and Canadian CCM 14048-L. Ultra HT carries a 10-year warranty and is manufactured in the USA.

For more information, visit mfmbp.com.