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    ​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:

    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, 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)
    • 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​

    Direct contact

    Master Builders Solutions Technical Support

    Construction Systems


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    Related Literature

    MasterSeal AWB 950 P & 970 FIB Data Sheet

    pdf (155.54 Kb)