DefenSeal Liquid Membrane®

DefenSeal® is a ready to use liquid latex waterproofing and crack isolation membrane specifically formulated for use beneath ceramic, porcelain and natural stone tile on horizontal and vertical applications. Applied by brush, roller or trowel, DefenSeal provides a continuous moisture barrier with flexibility giving it crack isolation properties. DefenSeal exceeds the requirements of ANSI A118.10 and can be used in commercial or residential applications.


  • Moisture barrier exceeding ANSI A118.10 requirements
  • Inhibits mold and mildew growth
  • Crack isolation protection up to 1/8” with fabric
  • Quick & easy application with brush, roller or trowel
  • Easy cleanup
  • Install tile, stone or ceramic, porcelain and natural stone directly on membrane
  • Safe, non-flammable
  • Extra Heavy Service Rating (ASTM C627/TCA)


  • Showers & Tub Surrounds
  • Kitchens
  • Food Processing Areas
  • Laundry Rooms
  • Bathrooms
  • Countertops
  • Commercial
  • Residential

Click on link below to download sheet.