<p>A premium roofing base sheet constructed with a strong glass mat. The extra strength #75 Base Sheets offer the excellent nail-holding ability, as well as superb tensile strength and resilience with no bleed through, reducing risks of splitting and cracking of the membrane. They will not rot, curl, or<br />shrink and are dimensionally stable for improved membrane performance. The sealed sheets also serve as an effective flame retarder for the application of <br />torch-applied modified bitumen membranes.</p>