Description
Overview
VersaBond-LFT is a polymer-modified large-format tile mortar for most interior and exterior floor and wall installations. Its non-sag, non-slump formulation supports large porcelain, ceramic and suitable natural stone while allowing a thicker setting bed than a conventional thin-set application.
Features
- Supports large and heavy tile for a flatter installation.
- Exceeds ANSI A118.4HT and A118.11 without extra additives.
- Suitable for specified in-floor heating assemblies.
Specifications
- Package: 50 lb.
- Continuous embedded bed: 3/32–3/4 in.; horizontal application limits apply
- 1/4 in. square notch: 90–100 sq. ft. per bag
- 1/4 × 3/8 × 1/4 in. square notch: 60–67 sq. ft.
- 1/2 in. square notch: 42–47 sq. ft.; manufacturer does not recommend this trowel—see Applications
- 3/4 × 9/16 × 3/8 in. U-notch at 45°: 34–38 sq. ft.
- Same U-notch at 30°: 42–47 sq. ft.
Color Options
- Gray
- White
Suitable Tile Types
- Vitreous, semi-vitreous or non-vitreous tile: ceramic, quarry, cement body tile, pavers
- Impervious porcelain
- Brick and stone veneer
- Cement-based precast terrazzo
- Gauged or ungauged natural stone tile
Suitable Substrates
- Concrete, mortar beds, masonry, Portland cement plaster
- WonderBoard® Lite, cement backerboards
- Liquid-applied waterproofing membranes such as RedGard®, Waterproofing and Crack Prevention Membrane, Custom® 9240, RedGard® SpeedCoat
- Crack isolation sheet membranes such as Crack Buster® Pro
- Uncoupling mats such as RedGard® Uncoupling Mat
- Substrates treated with MBP Multi-Surface Bonding Primer
- Exterior Grade Plywood (interior residential and light commercial dry areas)
- Gypsum wallboard (interior dry areas)
- Existing ceramic tile (scarified)
- Fully-bonded sheet vinyl flooring (scarified)
- Plastic laminates (scarified)
- Cutback adhesive (see preparation instructions)
Downloads
Applications
Use VersaBond-LFT for large and heavy tile over the compatible prepared substrates listed in Specifications. Select the mortar bed and trowel for tile warpage, underside pattern and required contact; a non-slump mortar does not correct an inadequately prepared floor.
Selection and Use
- CUSTOM does not recommend a 1/2-inch square-notch trowel because the ridge spacing makes full bedding more difficult. A deeper slanted, U-, V- or suitable large-format notch that promotes ridge collapse is preferred.
- A 3/4 × 9/16 × 3/8-inch U-notch at 30° provides the listed 42–47 sq. ft. estimate while improving ridge collapse compared with the 1/2-inch square notch.
- Achieve at least 80% mortar contact in dry areas and 95% in wet/exterior areas, with all tile edges supported. Lift tiles to check; large, deeply patterned or ungauged tile may need flat or notched back-troweling and extra mortar.
- Not for pools or water features. Moisture-sensitive or resin-backed stone needs a specified epoxy mortar; clear glass requires a suitable glass-tile mortar.
- Allow approximately 24 hours before grouting/light traffic and 7–10 days before heavy traffic, subject to conditions and a properly rated assembly.
