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A high quality, fast setting mineral underlayment that hardens tension free to a smooth, level surface ready to receive subsequent flooring systems. It hardens within hours to a smooth, strong, and multifunctional leveling layer. KÖSTER SL is easy to mix and spread, is pour- and pumpable, and is self leveling and highly flowable during application. KÖSTER SL can be used for area covering from 5 to 25 mm, be feathered out to 2 mm, and can fill depressions up to 25 mm. KÖSTER SL hardens crack free and has a high surface strength and a very good adhesion to the substrate.
Consumption: approx. 1.5 kg powder/m²/mm layer thickness
