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 Finestone Base Coats, FINESTOP, FINESTOP RA and FINESTOP VB.
WS FLASH is supplied in rolls, on release paper, for easy application.

​FEATURES
​BENEFITS
​Self-sealing, self-healing
​Maintains a seal when penetrated by fasteners
​Finestop, Finestop RA, Finestop VB and Finestone Base Coats can be applied to polyester face
​Use as part of adhesively applied EIFS
​Supplied in rolls on release paper
​Easy application


Uses

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


Packaging

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


Coverage

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

WS Flash / Flashing Primer Product Bulletin