MasterSeal AWB 970 FIB

MasterSeal AWB 970 FIB description

MasterSeal AWB 970 FIB is a patented, 30-mil thick, self-adhering, self-sealing, composite membrane of polyester fabric and rubberized asphalt. MasterSeal AWB 970 FIB is supplied in rolls, on release paper, for easy application. MasterSeal AWB 950 P is a single component, water-based primer specially formulated for use with MasterSeal AWB 970 FIB.

Recommended uses of MasterSeal AWB 970 FIB

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 MasterSeal AWB 660, MasterSeal AWB 665, or MasterSeal AWB 660 I onto MasterSeal AWB 970 FIB Flashing Membrane

MasterSeal AWB 950 P is to be used under MasterSeal AWB 970 FIB 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, GlasRocĀ®, 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)
  • MasterSeal AWB 660
  • MasterSeal AWB 665
  • MasterSeal AWB 660 I

Note: All places where MasterSeal AWB 970 FIB laps onto itself must be treated with MasterSeal AWB 950 P or 3M Super 77 spray adhesive

Features and Benefits of MasterSeal AWB 970

  • Self-sealing; maintains a seal when penetrated by fasteners
  • MasterSeal AWB 660, MasterSeal AWB 665, and MasterSeal AWB 660 I can be applied to polyester face of MasterSeal AWB 970 FIB

US/Canada Product Information

Data Guide

LEED Letter

LEED v4 Letter

Direct contact

Master Builders Solutions Technical Support

Construction Systems


Safety Data Sheet (SDS)

Find all available safety data sheets for this product.

Product Certifications

Generate a free certificate of conformance for a specific BASF construction product.

Related Literature

LEED v4 Letter for MasterSeal AWB 970

pdf (149.29 Kb)

MasterSeal AWB 970 / 950 P composite flashing membrane and primer

pdf (91.26 Kb)

MasterSeal AWB 970 FIB LEED Letter

pdf (184.42 Kb)