Coshocton, Ohio-based MFM Building Products Corp.’s Ultra HT Wind and Water Seal high temperature roof underlayment complies with CSA 123.22-08, “Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection.” The evaluation was completed by Canada Construction Materials Centre Evaluation Listing 14048-L.
The self-adhering 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. It is durable and has a 90-day UV exposure rating. Ultra HT Wind and Water Seal is engineered as a whole roof underlayment for use under all roofing systems including metal where high heat is generated.
It comes with a split release liner for valleys, ridges, around chimneys and at eaves for protection against ice dams, wind-driven rain and water penetration. Ultra HT Wind and Water Seal is rated to 121 C maximum service range. It has a thickness of 45 mils and is available in a 91-cm by 20.4-m roll. Ultra HT Wind and Water Seal comes with a 10-year limited warranty. For technical data, installation instructions and samples, visit www.mfmbp.com.
