EcoTouch Certified R Metal Building Insulation
Used as a primerless self-adhered Thru-Wall flashing. Note: A termination Bar is required for surface-mounted applications. Mas-N-Flash is a high performance self-adhered waterproof membrane that can be applied down to -20°F (-28°C) without the use of primer on most substrates.


  • 6 month exposure rating
  • Fully adhered system
  • No Primer needed
  • Can be applied to damp surfaces
  • No VOC’s, HFCC’s, nor CFC’s
  • Split release liner for easy application
  • Seals around properly installed fasteners

Compatible Surfaces

  • Wood
  • Concrete
  • CMU BLock
  • OSB Plywood
  • Glass mat exterior
  • Foam insulation board
  • ICF
  • Metal
  • TPO
  • EPDM