In high-heat climates, standard underlayments can soften or lose their adhesive properties. WaterGuard™ SA MetalGuard HT from A1A Wholesale Supply solves this with a specialized High-Temperature (HT) SBS formulation that maintains its integrity and bond strength even under intense thermal loads. This 60-mil membrane is a critical component for metal roofing systems, which naturally conduct and trap heat against the roof deck.

The top surface is a high-traction polyolefin film, providing installers with a secure and stable walking surface on various roof pitches. To ensure a seamless and efficient installation, the product features a poly split-release liner, allowing for precision placement and instant self-bonding at overlaps. Whether you are installing a standing seam metal roof or mechanically fastened tile, MetalGuard HT provides the durability and code-compliant protection required for long-term peace of mind.

Product Details

• Manufacturer: G.A.P. Roofing, Inc.

• Material: Polyolefin film surface with high-temp SBS bituminous adhesive.

• Thickness: 60 mils (ASTM D1970).

• Roll Dimensions: 39-3/8″ wide x 66′ long.

• Coverage: 216 sq. ft. (Approx. 2 Squares).

• Weight: 68 lbs per roll.

• Certifications: Florida Building Code Approved (FL22853.1) and Miami-Dade HVHZ Approved.

Features & Benefits

• Thermal Stability: Engineered specifically for high-heat roofing requirements where surface temperatures can exceed standard asphalt limits.

• Slip-Resistant Trax: The polyolefin film surface is designed for enhanced grip, increasing safety for crews moving across the roof during installation.

• Aggressive Self-Adhesion: The SBS modified asphalt backing creates a permanent, watertight seal to the roof deck, effectively “healing” around fastener penetrations.

• Extreme Weather Protection: Meets the nation’s strictest building codes (Miami-Dade), providing a robust secondary water barrier against hurricane-force rain.

• Ease of Application: The split-release liner simplifies the “peel-and-stick” process, especially in critical areas like valleys, hips, and ridges.

• Versatile Compatibility: Approved for use with all types of metal roofing, mechanically fastened tile, and direct-to-deck synthetic roofing products.

Applications

• Metal Roof Systems: The ideal foundation for standing seam, aluminum, and steel roofing.

• Mechanically Fastened Tile: Provides a heavy-duty, leak-proof substrate for clay and concrete tile installations.

• Direct-to-Deck Synthetics: A high-performance base for synthetic slate and shake products.

• Coastal Environments: Optimized for regions requiring High-Velocity Hurricane Zone (HVHZ) certification.

Technical Specifications & Logistics