TF Membrane: Polyester fabric and rubberized asphalt composite membrane


TF Membrane description

TF Membrane is a patented, 30-mil thick, self-adhering, self-sealing, composite membrane of polyester fabric and rubberized asphalt. TF Membrane is supplied in rolls, on release paper, for easy application. WS Flashing Primer is a single component, water-based primer specially formulated for use with TF Membrane.

Recommended uses

Used as an air barrier accessory to connect different air barrier materials or assemblies together to make the air barrier continuous.

  • Flashing at sills, approved sheathing joints, rough openings, and terminations
  • As an expansion joint seal
  • To create a seamless transition from Enershield-HP or Enershield-I onto Enershield-TWF Flashing Membrane

WS Flashing Primer is to be used under TF Membrane on these acceptable substrates and other surfaces:

  • Wood framing (Note: Verify adhesion before applying to wood that has been treated in any way.)
  • ASTM C1177 sheathings, e.g. eXPTM, GlasRoc®, SecurockTM and DensGlassTM
  • Water-resistant core gypsum sheathing (ASTM C79/ASTM C1396)
  • Cement-board (ASTM C1325 Type A Exterior)
  • Masonry
  • Exposure 1 or exterior plywood sheathing
  • Exposure 1 OSB
  • Steel framing
  • TF Membrane (itself)
  • Enershield-HP
  • Enershield-I​

Note: All places where TF Membrane laps onto itself must be treated with WS Flashing Primer or 3M Super 77 spray adhesive

Features and Benefits of TF Membrane 

  • Self-sealing; maintains a seal when penetrated by fasteners
  • Enershield-HP and Enershield-I can be applied to polyester face of TF Membrane

US / Canada Product Information

Product Guide

LEED Letter for TF Membrane

LEED Letter for Flashing Primer

SDS for Flashing Primer

Safety Data Sheet (SDS)

Find all available safety data sheets for this product.