Self-Adhesive Roof Underlayment - 36" x 65'

Deliver reliable roof protection with this 40 mil (1 mm) self-adhesive, self-sealing underlayment made of elastomeric bitumen with a trilaminated woven polyethylene surface. The nonslip, flexible sheet installs under any type of roof covering and operates from -40 to 200°F (-40 to 93°C) for year-round performance. Each 36" W x 65' L roll covers 195 sq.ft., enabling continuous, even coverage across roof areas. Easy to handle and secure in place, it supports professional standards and straightforward DIY work for durable, weather-ready installations and repairs.