Your ultimate roofing solution for extreme weather protection

By Jesse Sanchez. 

An underlayment engineered for maximum durability across all roofing systems.  

Ultra HT Wind & Water Seal®, by MFM Building Products, is more than just an underlayment — it's a high-performance, self-adhering solution designed to protect roofs from the harshest elements. With a 45-mil thickness and high-temperature rubberized asphalt adhesive, Ultra HT stands out for its ability to withstand temperatures up to 250°F, making it ideal for use under shingles, metal, and other high-temperature roofing systems. 

Ultra HT Wind & Water Seal® boasts a white, non-slip, cross-laminated polyethylene surface, which allows for safe traction during installation which is a critical feature when working on steep slopes or complex roof geometries. The underlayment is fitted with a split-release liner, simplifying installation around ridges, valleys and chimneys while ensuring a tight seal that guards against water infiltration and other structural risks from leaks. 

Ultra HT is a complete solution for roofers, contractors and building owners alike, offering unmatched protection and ease of use. It not only adheres aggressively to common building materials, but also self-seals around nails and fasteners, adding an extra layer of durability for both residential and commercial projects. 

Certified to rigorous standards, Ultra HT Wind & Water Seal® meets the demands of the Fortified Building Program and carries the UL Class A fire rating when paired with appropriate roofing materials. It can remain exposed for up to 90 days and accommodates the natural expansion and contraction of building materials, providing lasting security against water damage. 

To learn more about Ultra HT Wind & Water Seal® and its suitability for your next project, explore its detailed technical specifications and discover why it’s a top choice among roofing professionals!