August 24, 2015
If cement board and thinset are solid (not broken) I would not hesitate to use it if the thickness of levelquik will be according to mfr recommendations.
This is partial copy of mfr specification for levelquik product:
Suitable as an Underlayment for:
Vitreous, semi-vitreous or non-vitreous tile
Ceramic, mosaic or quarry tile
Impervious porcelain and glass tile
Cement-based precast terrazzo
Natural stone tile
Vinyl composition tile (VCT)
Sheet vinyl flooring
Existing ceramic tile
Exterior grade plywood
Cutback adhesive residue
Composition of Product
LevelQuik© is a proprietary dry blend of copolymers, cements, and
Benefits of Product in the Installation
Can be applied from feather edge to 1.5" (3.8 cm) thick in a single
Reduces bond failure and crumbling of resilient flooring
Cures fast and develops high early strength for quick installation
Rated for Extra Heavy use per ASTM C627
Rated for Residential use over wood subfloors with joists to 24" (61
cm) per ASTM C627
Limitations to the Product
For interior use only.
Do not bond directly to hardwood, Luan plywood, particle board,
parquet, cushion or sponge-back vinyl flooring, metal, fiberglass or
plastic. Contact CUSTOM technical services for recommendations.
Do not use when the temperature is below 50°F (10°C) or above 90°F
Do not use as a permanent wear surface.
Do not use on sloped surfaces that require drainage.
Precautions should be taken when applying over post-tensioned
concrete, pre-stressed concrete or prefabricated concrete planks.
Contact CUSTOM technical services for further details.
For installations over metal decks, contact CUSTOM technical services
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