Where time-intensive and labour-intensive removal of the floor covering was often necessary, with old needle fleece flooring, for example, WAKOL D 3060 Plastification Additive combined with a suitable Wakol levelling compound now allows direct levelling of the old covering. In addition, cleaned CV, PVC & ceramic tile surfaces can be directly levelled. A plasticiser block can also be achieved in existing floor coverings containing plasticisers, in order to rule out plasticiser interactions in the subsequent laying.