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Fortifiber FortiFlash 9" x 75' Butyl Flashing

Brand: Fortifiber Mfg#: M707009
Product#: 278M707009
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FortiFlash Butyl delivers in the most demanding environments, providing a strong self-sealing barrier to protect windows, doors and through-wall penetrations – as well as nonroofing conditions such as recessed windows, sill pans, pot shelves and parapets.


  • Chemically compatible with all standard sealants seals around fasteners ultra durable facer
  • Delivers lasting protection against water intrusion
  • Excellent low temperature adhesion
  • Split release sheet for easy integration mold resistant excellent low temperature adhesion
  • FortiFlash Butyl is composed of a coated woven facer, a butyl adhesive and a paper release liner
  • High performance self-adhesive waterproof flashing membrane
  • Seals around fasteners
  • Asphalt free


  • Brand: Fortifiber
  • Product Line: FortiFlash
  • Form: Pliable Adhesive
  • Specific Gravity: > 1
  • Material: Butyl
  • Resists: Water
  • Flash Point: > 450 deg F
  • Composition: Butyl Adhesive
  • Standards: ASTM D-779
  • Thickness: 20 mil
  • Type: Self-Adhesive
  • Media: Carbon Dioxide, Dry Chemical, Foam, Water
  • Tensile Strength: 70 psi
  • Odor/Scent: Slight Rubber
  • Color: Black
  • Length: 75 ft
  • Width: 9 in
  • Special Features: 9 in x 75 ft Packaging
  • Usage: To Protect Against Water Intrusion In Horizontal Applications Such as Pot Shelves, Parapets and Recessed Windows