Products / Metal Sales ms-HT Hi-Temp Underlayment

Metal Sales Manufacturing's self-adhesive SBS modified bitumen roofing underlayment with a slip-resistant woven polyethylene top surface, rated for surface temperatures up to 240 F for use under metal roofing and asphalt shingles. Supplied 40 mil thick in 3-foot by 67-foot rolls (200 square feet gross) and requires continuous support such as plywood or rigid insulation, with exposure before panel installation limited to 90 days. The product data sheet lists ASTM D1970 test values, Florida approval FL14392.1, Miami-Dade NOA 25-0904.02 and UL evaluation report ER21824-01.