Crack Isolation Membranes

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3-1/2 gallon unit
300 sq. ft. per pail
48 pails per pallet


PROFLEX® AF300 (ANTI-FRACTURE 300) is a ready-to-use single component mold resistant crack-isolation membrane. AF300 provides a uniform surface with excellent elongation to prevent in-plane cracks up to 3/8” from the substrate to the finished ceramic, porcelain, or stone tile. For residential to heavy commercial application; interior and exterior use.


  • Low VOC
  • Interior or exterior
  • Crack isolation up to 3/8″
  • Adheres to all common surfaces
  • Cures in 4-6 hours
  • Excellent adhesion to most common substrates
  • Apply with brush, 1” nap roller or trowel
  • Mold and mildew resistance
  • Ultra White formula

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