LIBERTY Asphalt Primer Specs

      LIBERTY Asphalt Primer Docs

      LIBERTY Asphalt Primer Videos

      About LIBERTY™ Asphalt Primer

      LIBERTY Asphalt Primer is a foundation coating that promotes an excellent bond for all types of asphalt-based roofing materials, such as LIBERTY SBS Self-Adhering Base/Ply Sheet & Cap Sheet.

      The right foundation for a variety of roof systems and materials

      Create a strong bond for masonry roofs, walls, or floors prior to the use of asphalt cutback adhesives or application of hot-mopped or cold-applied built-up roofing materials.

      Excellent Penetration

      The primer penetrates deeply to create a deep, durable bond for coating and adhesives.

      Strength and Flexibility

      Tenacious bonding accommodates temperature-related expansion and contraction of the roof system.

      Easy Application

      Brush, roll, or spray this primer that also maintains excellent low-temperature flexibility.


      Based on applicator type


      Apply smooth, heavy coat using parallel strokes for uniformity.


      Apply smooth, heavy coat using parallel strokes for uniformity. If the first coat is fully absorbed, apply a second coat.


      A high-quality 45:1 sprayer is recommended. Consult the manufacturer for optimum PSI, tip size, length of hose, and number of spray guns required for a uniform coat.
      LIBERTY™ SBS Self-Adhering Roofing System Installation — Step-by-step*
      GAF roofing contractor with wheel barrow.

      Step 1
      Inspect the roof, and repair or replace damaged areas.

      GAF roofing contractors rolling on LIBERTY Asphalt Primer.

      Step 2
      Apply LIBERTY Asphalt Primer at a rate of a 1/2 gallon per 100 sq. ft.

      GAF contractors installing LIBERTY SBS Self-Adhering Base/Ply on flat roof.

      Optional (for 2-ply system):
      Install LIBERTY SBS Self-Adhering Base/Ply.

      Contractor applying LIBERTY Flashing Cement on exposed roof flange.

      Step 3
      Install edge flashing at all eave and rake edges, and apply LIBERTY Flashing Cement on exposed flange.

      GAF roofing contractors installing LIBERTY SBS Self-Adhering Cap Sheet on a flat roof.

      Step 4
      Install LIBERTY SBS Self-Adhering Cap Sheet.

      Finished flat residential roof with GAF LIBERTY system.

      Step 5
      Clean up by removing tools, unused materials, and other debris. Plan on inspecting roof annually if possible.

      *See application instructions for complete details.

      See similar products

      Can of GAF LIBERTY Flashing Cement Premium SBS.
      LIBERTY™ Flashing Cement

      A premium formulation for use as a cold-applied bonding agent with GAF LIBERTY™.

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      GAF LIBERTY Cap Sheet roofing membrane for low-slope areas.
      LIBERTY™ Cap Sheet

      Granule-surfaced roofing membrane for low-slope areas

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      GAF LIBERTY Base Sheet roofing membrane for modified bitumen systems.
      LIBERTY™ Base Sheet

      Membrane used as a base for LIBERTY™ Cap Sheet or as a ply sheet for modified bitumen systems

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