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Ultraflex LHT SG Professional Tile Mortar
Ultraflex LHT SG Professional Tile Mortar

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Product Code: 40.12460



Mapei Ultraflex LHT SG Professional Tile Mortar

Ultraflex LHT SG is a standard-grade, non-sag, nonslump, polymer-modified, large-and-heavy-tile mortar and thin-set mortar for interior/exterior installations on floors, walls and countertops. It is used to install large-format and heavy tile/stone, including porcelain tile, heavy-ribbed-back tile, brick pavers, dimensional tile and natural-stone tile. Ultraflex LHT SG is designed for use at 3/32" to 1/2" (2.5 to 12 mm) thickness to give better support under large-format tile. This mortar is formulated with Easy Glide Technology for ease of application and good adhesion to the substrate and tile

Features & Benefits
  • Nonslump for large-format and heavy tile/stone in floor application
  • Non-sag for large-format and heavy tile and stone in wall application
  • For thicker bond coats from 3/32" to 1/2" (2.5 to 12 mm)
  • Smooth and creamy consistency for easy application
  • Polymer-enriched for good performance

Where to Use
  • Most interior/exterior residential installations on floors, walls and countertops)
  • Most interior/exterior commercial installations on floors and countertops
  • Most interior commercial installations on wall
  • Installation of ceramic and porcelain tile; cultured stone; quarry tile; pavers; Saltillo tile; dimensional tile; and most types of marble, granite and natural stone

Suitable Substrates
  • Concrete (cured at least 28 days
  • Masonry cement block, brick, cement mortar beds, render coats and leveling coats
  • Cement backer units (CBUs) – see manufacturer’s installation guidelines
  • Gypsum wallboard and plaster – interior walls in dry areas only. Priming may be required. See the technical bulletin “Tiling over gypsum” in the Related Documents section of the Tile & Stone Installation Systems page on MAPEI’s Website.
  • Existing ceramic and porcelain tile, quarry tile and pavers (interior and dry conditions only floors and countertops in dry conditions only)
  • Plywood underlayments must be a Group 1 exterior-grade plywood CC-plugged or better, conforming to APA classification and U.S. Product Standard PS 1-95 or a “SELECT” or (SEL-TF) CANPLY classified exterior-grade plywood conforming to CSA-0121 standard for Douglas fir for direct-bond (interior, residential and light commercial floors and countertops in dry conditions only
  • VCT, cutback residue and non-cushioned sheet vinyl (interior only
  • MAPEI waterproofing, crack-isolation, sound-reduction and uncoupling membrane
Consult MAPEI’s Technical Services Department for installation recommendations regarding substrates and conditions not listed.

  • 50 lb bag

Available Colors
  • White

Approximate Coverage
  • 1/4" x 1/4" x 1/4" Square-Notch Trowel: 75 to 90 sq. ft
  • 1/4" x 3/8" x 1/4" Square-Notch Trowel: 55 to 65 sq. ft.
  • 1/2" x 1/2" x 1/2" Square-Notch Trowel: 38 to 45 sq. ft.
  • 3/4" x 9/16" x 3/8" U-Notch Trowel: 25 to 30 sq. ft.
* Coverage will depend on trowel shape and size.

Mapei Part # 218423
Mapei Ultraflex LHT SG Technical Data Sheet

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