SOPRASTAR™ Flam is an SBS-modified bitumen cap ply for use in approved multi-ply membrane and flashing assemblies. SOPRASTAR Flam is composed of a proprietary formulation of elastomeric styrene-butadiene-styrene (SBS) polymer modified bitumen and is reinforced with a tough, dimensionally stable composite polyester/glass fiber reinforcement. The topside is surfaced with a highly reflective white film and underside is surfaced with polyolefin burn-off film to optimize heat welding.

Product Properties

  • ASTM ASTM D6162
  • Component Cap
  • Installation Method Heat Welded
  • Reinforcement Composite
  • Thickness 138 mils (3.5 mm)
  • Topside Reflective Film
  • Underside Burn Off Film


Prior to installation, unroll SOPRASTAR Flam onto the roof surface and allow to relax. Position SOPRASTAR Flam in desired position and back roll the product. SOPRASTAR Flam is then heat welded to approved substrates. Refer to the SOPREMA® SBS Roofing Manual for additional application guidelines.

Testing & Approvals

CRRC ENERGY STAR FBC FL3915-R15  Modified Bitumen Roof Systems FM Miami-Dade UL

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