Boral TileSeal HT Modified Asphalt Roof Underlayment 36 in x 72 ft, 216 sq ft

Boral TileSeal HT Modified Asphalt Roof Underlayment is a professional-grade roof underlayment engineered to provide superior protection beneath shingles, shakes, tile, or metal roofing. Each 36 in × 72 ft roll covers 216 sq ft and is designed with a high-strength, nonwoven polyester surface that resists tears during installation. This modified-asphalt construction is designed to lay flat and provides a slip-resistant walking surface to enhance safety and ease of use during installation.

Because the underlayment is made from durable rubberized asphalt, it does not absorb water or wrinkle like traditional felt. The material resists mold growth, ensuring a dry and stable roof deck. The high-performance formulation offers excellent wind resistance and durability even during heavy roof traffic and harsh weather conditions.

TileSeal HT is lightweight enough for easy handling by roofing crews, with a nominal weight of 70 lb per roll. Its advanced backside non-slip coating and UV exposure resistance of up to 180 days allow for faster, wrinkle-free installation and longer-lasting protection for the roof deck until the primary roofing material is applied.

• Roll size: 36 in W × 72 ft L (216 sq ft coverage)
• Modified asphalt – Rubberized, water-resistant construction
• Slip-resistant surface for enhanced installation safety
• Durable nonwoven polyester surface withstands high foot traffic
• UV resistance for up to 180 days uncovered exposure
• Ideal under shingles, shakes, tiles, metal, and low-slope membranes
• Manufacturer part number: 91020
• Weight: Approx. 70 lb per roll

Fast, contractor-friendly installation

TileSeal HT is engineered for easy handling and quick installation. The high-quality, lightweight material features a non-slip surface for added safety on the job site, allowing roofing professionals to work faster and with fewer complications. The rolls are designed to lay flat, improving the ease of installation and minimizing wrinkles. TileSeal HT can be self-adhered or cold-nailed and is compatible with a wide variety of roofing systems, making it a versatile choice for both residential and commercial applications.

Durability in extreme conditions

TileSeal HT passes ASTM standards and is resistant to harsh environmental conditions, including extreme heat, heavy rain, snow and ice, and high winds. Its strength and flexibility make it suitable for use in a variety of climates, including cold temperatures where traditional felt may become stiff and difficult to handle.

Certified for performance

TileSeal HT is a trusted choice among roofing professionals, meeting key industry standards such as ASTM D226 and D4869, ensuring reliability and superior protection under shingles, shakes, tiles, and metal roofing.

Dimensions

Roll: 36 in × 72 ft

Weight

70 lb per roll