About GAF SA Vapor Retarder XL

GAF SA Vapor Barrier XL is a self-adhered, vapor-inhibiting membrane designed for use in approved roofing membrane assemblies. It’s composed of a trilaminated woven polyethylene facer combined with an advanced, high-tack butyl rubber adhesive. The under-face is applied with a split silicone release film that is removed during installation. This uniquely durable product exhibiting high tensile strength can be left exposed for up to 180 days when installed in accordance with published GAF specifications and details.

Benefits of GAF SA Vapor Retarder XL

Designed to be self-sealing with increased adhesion performance, GAF SA Vapor Retarder XL provides three times the peel strength compared to self-adhered modified bitumen vapor barriers.

Product Documentation

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Installation

Fast and easy to install.
  1. installation

    Step 1: Kick out the roll, maintaining 3" end and side laps.

  2. installation

    Step 2: Maintain proper placement to the previous roll.

  3. installation

    Step 3: Carefully peel back the silicone release film.

  4. installation

    Step 4: Peel the liner low and at a 45-degree angle. Use a weighted roller to smooth the membrane.

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