Eliminate the need for torches, hot asphalt, or messy cold adhesives with the G.A.P. WaterGuard™ Self-Adhered SBS Base Sheet, distributed nationwide by A1A Wholesale Supply. This 55-mil base ply is engineered for modern “peel-and-stick” efficiency, offering superior adhesion and excellent water hold-out properties for low-slope residential applications.

The polyolefin film top surface is designed to provide a perfect bonding substrate for a secondary cap sheet or other cold-applied built-up roofing (BUR) components. With its integrated poly split-release liner, installation is fast and precise—simply peel the backing and press the membrane into place. This system is particularly favored for residential additions where safety and speed are priorities, providing a professional-grade moisture barrier that outperforms traditional organic base sheets.

Product Details

• Manufacturer: G.A.P. Roofing, Inc.

• Material: Polyolefin black film surface with SBS-modified bituminous adhesive.

• Thickness: 55 mils (Professional Grade).

• Roll Dimensions: 39-3/8″ wide x 67′ long.

• Coverage: 216 sq. ft. (2 Squares) per roll.

• Weight: 70 lbs per roll.

• Logistics: 20 rolls per pallet / 600 rolls per truckload.

Features & Benefits

• Seamless 2-Ply Foundation: Specifically engineered to work in tandem with G.A.P. WaterGuard™ SA SBS Cap Sheets for a complete, warrantied low-slope system.

• Aggressive Self-Adhesion: The SBS-modified back surface creates a permanent bond to the roof deck, effectively “healing” around fastener penetrations.

• Polyolefin Top Surface: Provides a clean, polymeric surface that ensures maximum interlaminar bond strength for the subsequent cap ply.

• Split-Release Liner: The factory-applied backing is easily removed in sections, allowing for controlled placement and fewer wrinkles during application.

• Superior Water Hold-Out: Acts as an immediate waterproof layer upon installation, protecting the building envelope during the construction process.

• Flame-Free Installation: Ideal for residential environments where the use of open torches or hot kettles is restricted or undesirable.

Applications

• Residential Low-Slope: Perfect for patio roof extensions, carports, and porch transitions.

• 2-Ply SBS Systems: Used as the essential base ply beneath a granulated SBS cap sheet.

• Cold-Applied BUR: Suitable for various multi-ply assemblies requiring a high-strength polymeric base.

• Primary Waterproofing: Provides a robust moisture barrier over wood decks or approved insulation boards.

Technical Specifications & Logistics