Westlake Royal™ TileSeal™ HT Underlayment
Westlake Royal Roofing Components TileSeal Underlayment is Westlake Royal Building Solutions’ best roof underlayment. Self-adhered, premium high temp underlayment for tile and metal roofs that is easy to install and provides an extremely strong slip resistant surface for durability and the modified asphalt core seals around nail penetrations, making it the preferred choice of roofers, contractors, architects and builders.
About TileSeal HT Underlayment
Features
- Premium self-adhered underlayment for fast, easy installation
- Suitable under all roofing materials, including metal
- Superior slip-resistant, high strength non-woven polyester surface
- Ideal for foam fastening roof tiles
- Self-seals around mechanical fasteners
- UV resistant for up to 6 months of exposure
- Up to 10 tiles per stack when roof loading
- Stable in low and high temperatures for all climates
- 30-year manufacturer’s limited warranty
Specificiations
- Roll Size 3’ x 72’
- Coverage Net 2 squares
- Roll Weight 70 lbs (nominal)
- Thickness 64 mil (nominal)
- Rolls per Pallet 20 Rolls
- Pallet Weight 1454 lbs (nominal)
Part Numbers
- 91020 Net 2 Square Roll
- 91059 Drop Ship/Ship To - 660 Rolls/Truck
- 91860 Drop Ship/Ship To - 20 Rolls/Pallet Mixed Truck
Certifications & Approvals
- Miami-Dade County Approved
- Florida Building Code FL14317
- ASTM Patent D4869, D226, Type I and Type II D1970, E2178
- US 6,296,912 B1
Applications
- Under all roofing materials (Concrete and Clay Tile, Metal, Shake & Slate, Composite, Asphalt shingles)
Warranty
- Limited 30 Year Warranty
Premium High‑Temp Roofing Protection
In this Oceanside facility segment, Doug Thagard spotlights how TileSeal™ HT delivers robust high‑temperature roofing protection under tile and metal systems.
See how the high‑temperature formulation is built to handle intense sun and thermal cycling while simplifying installation on complex roof geometries.
Resource Center
Explore our library of educational resources—including product literature, installation guidelines, technical documents, and more—to help guide every stage of your project.
FAQs
Roofing components like underlayments, battens, and flashing are critical for waterproofing, securing tiles, and preventing leaks or damage, ensuring a long-lasting roof system.
It's essential to follow the installation guidelines provided for each component. Consulting with a professional roofer can also ensure optimal performance.
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