PermaFlex® 300 LHT Mortar


PermaFlex® 300 LHT Mortar is a one-component, polymer-modified, Portland cement-based mortar designed to set large format ceramic and stone tile firmly in place, without lippage or shrinkage. It can be used for interior and exterior floor applications over concrete where the embedded thickness is between 3⁄32"-1⁄2" (2.4 mm-12mm).

Recommended Tile Type

  • Large Format
  • Large Heavy
  • Gauged Porcelain Panels - Floor Only
  • Standard
  • Ceramic
  • Porcelain
  • Slate
  • Cement
  • Natural Stone
  • Quarry
  • Pavers

ANSI Specification

  • A118.4

Set Speed

  • Standard

Recommended Substrates

  • Cementitious

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

Product Features

  • Helps overcome irregularities in tile thickness
  • Can be used for bedding thickness 3⁄32"-1⁄2" (2.4 mm-12 mm)
  • Zero VOC
  • Contributes to LEED® project points


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