400 sq. ft. /gal. *Note Coverage will vary depending on porosity of substrate and application type. Coverage values are approximately a 3/8″ Nap Roller.

Suitable Surfaces

Gypcrete™ substrates, Dusty Slabs, Concrete, Backer Boards

-Interior Gypsum Based Primer-

PROFLEX® GP1® is specially formulated primer for use with PROFLEX® elastomeric membranes over Gypcrete® substrates. GP1 is suitable for interior and exterior conditions. Depending on application type and substrate porosity, the primer will dry to use in 20 – 45 minutes.


  • Easy application with roller or sprayer
  • Safe non flammable
  • Easy cleanup
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1 gallon pail