Siena Self-Leveling Underlayment 20 (SL20) is a portland cement based, rapid setting mortar designed to create a smooth, level surface prior to the application of a variety of floor coverings. It is designed for fast leveling of floors from 1/2″-1½” with minimum time and labor. Surfaces can be walked on in 2 to 4 hours and the floor coverings can be installed within 12 to 24 hours. Siena Self-Leveling Primer should be used prior to using SL20.
Siena Self-Leveling Underlayment 20 (SL20) can be used over concrete, plywood, terrazzo, quarry and tile in commercial and residential projects. Once the Siena SL20 has cured, tile, stone, carpeting, marble, resilient floor, wood, parquet and other approved floor covering may be applied.