Finish your low-slope projects with the ultimate in protection and aesthetics using the G.A.P. WaterGuard™ Self-Adhered SBS Cap Sheet, distributed nationwide by A1A Wholesale Supply. This heavy-duty, 140-mil membrane serves as the exposed surface layer in a high-performance roofing system, offering superior resistance to weathering, foot traffic, and thermal expansion.

The SBS-modified asphalt remains flexible across a wide temperature range, preventing the cracking or “alligatoring” often seen in standard oxidized asphalt products. Because it is self-adhered, it eliminates the safety risks and odors associated with torches, hot kettles, or volatile cold adhesives. With a factory-applied split-release film, installers can achieve a precise, wrinkle-free application in valleys, roof-to-wall transitions, and over entire low-slope decks.

Product Details

• Manufacturer: G.A.P. Roofing, Inc.

• Material: Fiberglass-reinforced, SBS-modified bituminous cap sheet.

• Surface: Ceramic-coated mineral granules (Available in 9 colors).

• Thickness: Industrial-grade 140 mils.

• Roll Dimensions: 39-3/8″ wide x 33′ long.

• Coverage: 108 sq. ft. (1 Square) per roll.

• Weight: 80 lbs per roll.

• Logistics: 25 rolls per pallet / 600 rolls per truckload.

Features & Benefits

• Color-Matched Aesthetics: Available in a wide variety of colors—including Weatherwood, Dark Oak, and Cedar—to seamlessly blend low-slope sections with the main shingle roof.

• Flame-Free Safety: The self-adhesive backing allows for a safe “peel-and-stick” application, making it ideal for residential areas and tight spaces.

• Superior Flexibility: SBS (Styrene-Butadiene-Styrene) polymer modification ensures the membrane stays pliable in cold weather and stable in high heat.

• Rugged 140-Mil Profile: Provides exceptional puncture resistance and durability against the elements.

• Integrated Split-Release Liner: Simplifies handling and ensures a fast, accurate bond to the base sheet or substrate.

• Dual-Purpose Utility: Functions perfectly as both a primary surface membrane and a high-performance flashing membrane for valleys and roof penetrations.

Color Options

Customize your roof with our extensive color palette:

• Black | White | Weatherwood | Cedar

• Dark Oak Blend | Red | Brown * Emerald Green | Green

Applications

• Residential Low-Slope: The go-to surface membrane for patio covers, carports, and home additions.

• 2-Ply SBS Systems: Used as the final exposed layer over G.A.P. WaterGuard™ SA SBS Base Sheet.

• Flashing Details: Excellent for reinforcing valleys, dormers, and roof-to-wall transitions.

• Repair & Maintenance: A durable solution for patching or upgrading existing low-slope asphalt roofs.

Technical Specifications & Logistics