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Professional Grade Large And Heavy Tile Mortar

SikaTile®-400 LHT Pro Set is a professional grade, single-component, non-shrinking, polymer-modified mortar for interior and exterior setting of large and heavy tile and natural stone. It may be applied from at 3/32" to 3/4" (2.4 mm to 19 mm) thickness to provide better support under large and heavy tiles and stone and can be used for both interior and exterior installations of tile in most residential and commercial floor and wall applications. SikaTile®-400 LHT Pro Set, features innovative Dustless Technology producing approximately 80% less dust than ordinary thin sets and is designed to promote cleaner working conditions and reduce mess. It uses less water and is creamier and easy to spread.

  • For use with large and heavy tile and natural stone
  • Non-slumping/Non-shrinking formula eliminates tile lippage
  • May be applied up to 3/4" (19 mm) thick on horizontal applications


SikaTile®-400 LHT Pro Set supports large and heavy tile for flat, even installation and is suitable for bonding the following types of tile and stone:
  • Brick and thin brick
  • Cement-based precast terrazzo
  • Impervious porcelain and glass tile
  • Natural stone tile
  • Vitreous, semi-vitreous or non-vitreous tile:
  • Ceramic, mosaic, quarry, cement body tile
  SikaTile®-400 LHT Pro Set can be installed in most interior and exterior residential and commercial installations on floors and walls on the following recommended substrates:
  • Brick Masonry
  • Cement Backer Board1
  • Cement Mortar Beds
  • Cement Plaster
  • Cement Terrazzo
  • Ceramic Tile and Stone
  • Concrete
  • Concrete Masonry
  • Gypsum Wallboard2
  • SikaLevel® Products
  • SikaTile® Membranes
  • Approved SikaLastic® Under Tile Waterproofing
1 Consult cement backer board manufacturer for installation recommendations and to verify acceptability for exterior use.2 Interior Use Only.


  • For use with large and heavy tile and natural stone
  • Non-slumping/Non-shrinking formula eliminates tile lippage
  • May be applied up to 3/4" (19 mm) thick on horizontal applications
  • For interior and exterior floors and walls
  • Dustless formula – provides approximately 80% less dust than ordinary mortars
  • Cleaner working conditions by minimizing dust
  • Creamier and easier to spread
  • Uses less water for consistent hydration and quicker drying
  • Longer working time
  • No-Slake - No wait. Just mix, trowel, and install
  • Mold and mildew resistant


Sika® is committed to environmental responsibility in both products produced and in manufacturing practices. Use of this product can contribute towards LEED® v4.1 certification:

  • Up to 2 points towards MR Credit 5, Regional Materials
  • Up to 1 point towards IEQ Credit 4.1, Low-Emitting Materials – Adhesives & Sealants



American National Standards Institute (ANSI) — ANSI A108.5 and A118.4 of the American National Standards for the Installation of Ceramic Tile ASTM International (ASTM)

  • ASTM C109 Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2" or 5 mm Cube Specimens)
  • Resilient Floor Covering Institute - (RFCI) Recommended Work Practices for Removal of Resilient Floor Coverings
  • Tile Council of North America (TCNA) - TCNA Handbook for Ceramic Tile Installation, TCNA EJ171 Movement Joint Guidelines.
  • ISO 13007-2 C1

Chemical Base

Portland cement, selected aggregates, water retention additives, re-dispersible polymer

Shelf Life

15 months from date of production when stored in original, sealed package

Storage Conditions

Store in undamaged, original, sealed package, in dry conditions at 73⁰ F (23⁰ C)

Slant Shear Strength

4 Week Shear Bond Strength


Test Method


Typical Results

Glazed Wall Tile

Section 5.1.5

> 300 psi

350 - 400 psi

Porcelain Tile

Section 5.2.4

> 200 psi

300 - 350 psi


ISO 13007 Classification

Classification Code

Classification Requirement


C1 (cementitious, normal adhesion) ≥ 72.5 psi (0.5 MPa) after standard aging. Heat aging, water immersion and freeze/thaw cycles

Application Information

Mixing Ratio

5 quarts (4.75 liters) of clean potable water per 50 lb. bag

Layer Thickness

May be applied from 3/32" to 3/4" (2.4 mm to 19 mm) thickness to provide better support under large and heavy tiles and stone

Pot Life

3 Hours

Open Time

> 20 Minutes

Cure Time

Allow 24-48 hours before grouting and light traffic, and 7 days before heavy or vehicular traffic.


In a clean container, add approximately 5 quarts (4.75 liters) of clean potable water, then add the contents of the 50 lb. (22.68 kg) SikaTile®-400 LHT Pro Set Mortar. Mix thoroughly by hand or with a slow speed mixer to a smooth, thick, trowelable consistency. Mortar consistency shall be such that when applied with the recommended notched trowel to the substrate, the ridges formed in the mortar do not flow or slump. During use, stir mortar mix occasionally. Do not add additional water. Do not add latex liquid additives to SikaTile®-400 LHT Pro Set.


Read all installation instructions before installation. Choose a notched trowel with sufficient depth to achieve more than 80% mortar coverage and transfer to substrate and back of tile to both the tile and substrate for all interior applications, and more than 95% for exterior, commercial floor, and wet applications, back-butter the tile to meet these requirements. With pressure, apply a coat of mortar by using the flat side of the trowel to key the mortar into the substrate. With the notched side of the trowel, apply additional mortar by combing it in a single direction parallel to the shortest dimension of the tile. Spread only as much mortar as can be tiled before the product skins over. Open time can vary with job site conditions. Set tiles firmly into the wet mortar and push the tiles back and forth in a direction perpendicular to trowel lines to collapse the mortar ridges and to help achieve maximum coverage.

Movement Joints: All expansion, control, construction, cold, saw-cut, isolation, contraction, and seismic joints in the structure should continue through the tilework, including such joints at vertical surfaces, as specified per TCNA Method EJ171 or TTMAC Specification Guide 09 30 00, Detail 301MJ. Do not cover movement joints with mortar.