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HYDROFLEX FLASH is a waterproofing, adhesive and detailing compound for air barrier applications that combines the best characteristics of silicone and polyurethane. This single-component, Silyl-Terminated-Polymer (STP) is easy to gun, spread-and-tool to produce a highly durable, seamless, elastomeric flashing membrane. Allows for same day installation of windows, doors and other wall assembly, waterproofing or air barrier components.

Streamlines preparation by eliminating the need for joint reinforcing tapes.


  • Silane functional polymer provides superior long term adhesion, crack bridging and weathering characteristics.
  • Bonds to most common building materials without priming.
  • Single component saves time.
  • Produces a durable, weather-tight seal.
  • No shrinkage. No staining. No yellowing.
  • Breathable – allows damp surface to dry.
  • Compatible with most sealants and Adex HYDROFLEX membrane components.

Files to download

Technical sheet

Safety data sheet




Air & Moisture Barrier, Vapour Permeable

Air & Moisture Barrier, Vapour Retarder