Single Layer Floor

1Flex® 1/4" Crack Isolation Mortar

1Flex® 1/4" Crack Isolation Mortar

Tile setting mortar that also functions as a 1/4" crack isolation membrane.  Also designed for the installation of tile directly over plywood/OSB with joist spacing up to 24" o.c. as part of the TEC® Single Layer Floor System.  For use over plywood, cementitious surfaces and other substrates.


  • One-step crack isolation and tile setting.
  • Superior bond strength.
  • Isolates horizontal movement of cracks up to 1/4".
  • Exceeds ANSI A118.4, A118.11 and A118.15 specifications
  • Provides 50 lbs. of coverage in a 35 lb. bag.
  • Contains 1% pre-consumer recycled content and zero VOC.
  • Available in 35 lb. bags.

Conforms with LEED v4 low emitting interiors.
Compliant with (CDPH) Standard Method v1.2 VOC Emissions.

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1Flex® 1/4" Crack Isolation Mortar


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1Flex Single Layer Floor System-4 page


1Flex Crack Isolation Mortar Sell Sheet

Color Color Name Download
333 Standard Gray

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334 Standard White

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