Norcros Pro 50 Levelling Compound providing a level substrate to install tiles on to and also protects the heating elements during the fixing process. Norcros Pro 50 Levelling Compound is also suitable for use on timber floors, although these must be overlaid with a minimum 15-18mm thick WBP or Marine Grade Plywood screw fixed at maximum 300mm centres to both joists and existing boards before application of the levelling compound. The plywood should be primed with neat Norcros Prime Bond which should be allowed to dry prior to application of the levelling compound. Before applying Norcros Pro 50 Levelling Compound it is essential to ensure that the floor is sufficiently rigid and deflection free to support the additional weight of tiling before commencing. The excellent levelling and flow properties of this product make it ideal for preparing sub floors prior to fixing ceramic or Porcelain tiles or soft floor coverings such as carpet vinyl and timber.