COSHOCTON, Ohio - MFM Building Products, a manufacturer of a full envelope of waterproofing and weather barrier products for the building industry, announced that its Ultra HT Wind & Water Seal™ high temperature roofing underlayment complies with ICC-ES Acceptance Criteria for Roofing Underlayments (AC188) and Roof Underlayment for Use in Severe Climate Areas. A copy of the ICC-ES ESR-1737 report can be found at
This self-adhering “self-stick” roofing underlayment is composed of a cool white, non-slip, cross-laminated, high density polyethylene film laminated to a high temperature rubberized asphalt adhesive system. This premium product is extremely tough and durable, and offers a 90-day UV exposure rating.
Ultra HT is engineered as a whole roof underlayment for use under all roofing systems, including metal where high heat is generated. Product rolls out smooth and lays flat while offering the contractor excellent foot traction. Ultra HT comes with a split release liner for use in valleys, ridges, around chimneys and at eaves for protection against ice dams, wind-driven rain and water penetration. Ultra HT aggressively adheres directly to the roof deck and self-seals around roofing fasteners. Product is rated to 250°F maximum.
Ultra HT has a thickness of 45 mils nominal and is available in a 36” width by 67’ length (2 square) roll. In addition, the product meets ASTM D 1970, Florida Building Code FL16562, Miami-Dade County NOA 13-1125.06 and comes with a 10-Year limited warranty.
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