SBS RU85 Premium Synthetic Roofing Underlayment (63 Roll per Pallet)

Contractor-Grade Protection. Built for Performance.

The Strata SBS RU85 is a premium synthetic roofing underlayment engineered to provide dependable, long-lasting protection beneath asphalt shingles, metal roofing, tile, and other steep-slope roofing systems. Designed for professional roofing contractors, SBS RU85 delivers exceptional strength, lightweight handling, and superior weather resistance while outperforming traditional asphalt felt in demanding jobsite conditions.

Its high-strength woven construction creates a durable secondary moisture barrier that helps protect roof decks from wind-driven rain, water intrusion, and severe weather during both installation and the life of the roof. Unlike conventional felt, SBS RU85 resists tearing, wrinkling, moisture absorption, and deterioration, making installation faster and more reliable.

Product Features

• Covers 10 Squares (48" × 250')
• Premium woven synthetic construction
• Slip-resistant fiber-grip walking surface
• Chalk-line compatible surface
• Lightweight design for faster installation
• Fewer seams and overlaps than traditional felt
• Up to 90 days of UV exposure
• 50-Year Limited Warranty
• Suitable for asphalt shingles, metal, tile, cedar shake, and other steep-slope roofing systems
• Designed to resist tearing, stretching, and moisture absorption