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    WS Flash and Flashing Primer

    WS FLASH is a patented, 30-mil thick, self-sealing, self-healing composite membrane of polyester fabric and rubberized asphalt.

    WS FLASH is compatible with Senergy Base Coats, SENERSHIELD-R, SENERSHIELD-RS, and SENERSHIELD-VB.

    WS FLASH is supplied in rolls, on release paper, for easy application.



    ​Self-sealing, self-healing

    ​Maintains a seal when penetrated by fasteners

    ​Senershield-R, Senershield-RS, Senershield-VB, and Senergy Base Coats can be applied to polyester face

    ​Use as part of adhesively applied EIFS

    ​Supplied in rolls on release paper

    ​Easy application


    • Used as an air/water-resistive barrier accessory to connect different air barrier materials or assemblies together to make the air/water-resistive barrier continuous.

    • Flashing at sills, approved sheathing joints, rough openings, and terminations.

    • As an expansion joint seal.

    • FLASHING PRIMER is to be used under WS FLASH membrane on these acceptable substrates and other surfaces:

    1. Wood framing (Note: Verify adhesion before applying to wood that has been treated in any way.)

    2. ASTM C1177 sheathings; e.g. eXP™, GlasRoc®, Securock™ and DensGlass™.

    3. Water-resistant core gypsum sheathing (ASTM C79/ASTM C1396)

    4. Cement-board (ASTM C1325 Type A Exterior)

    5. Masonry

    6. Exposure 1 or exterior plywood sheathing

    7. Exposure 1 OSB

    8. Steel framing

    9. WS FLASH (itself)

    10. BASF Wall Systems Air/Water-Resistive Barriers


    WS FLASH 4:
    10.2 cm x 30.5 m (4" x 100'), 9 rolls per carton

    WS FLASH 9:
    22.9 cm x 30.5 m (9" x 100'), 4 rolls per carton


    WS FLASH 4:
    274.3 Lin m (900 Lin ft) per carton

    WS FLASH 9:
    121.9 Lin m (400 Lin ft) per carton

    WS Flash / Flashing Primer Product Bulletin Teaser Image

    WS Flash / Flashing Primer Product Bulletin