Professional SLC 1550 Universal is a single pack. fast- drying, fibre-reinforced, cement-based underlayment.It is manufactured from a controlled blend of special sands, cements and synthetic polymers to give a high quality flooring product which is self-levelling and smoothing. For use in fast track domestic and commercial situations such as where levelling of up to 50mm is required or for use over underfloor heating and more difficult substrates e.g. timber. It does not provide a wearing finish and must be overlaid with a suitable resilient floor finish e.g. carpet, ceramic tiles, vinyl, resin coatings etc. It is ideal for offices, dwellings, schools, hospitals, airports etc.