GAF SA Vapor Retarder Specs

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      Why GAF SA Vapor Retarder?

      GAF SA Vapor Retarder is an SBS modified bitumen vapor retarder for use in approved GAF roof assemblies. 

      GAF SA Vapor Retarder is composed of a proprietary formulation of elastomeric styrene-butadiene-styrene (SBS) polymer modified bitumen in combination with a high tack self-adhesive. The topside is surfaced with high-strength tri-laminate polyethylene film and the underside is surfaced with protective polyolefin release film that is removed during application.


      Benefits of RUBEROID® 20 Smooth Membrane include:
      • System guarantees are available for up to 20 years1
      • Lightweight:  Installed roof designs weigh less than three pounds per square foot
      • Combines the strength of fiberglass reinforcement with the elongation characteristics of SBS-modified asphalt
      • Available as a smooth surface

      Where to buy

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