Heavy-Duty Scale Remover - Scalex - 5LScalex is safe to use on a variety of floor coverings and provides a deep cleaning action to all tiled surfaces. Not for use on stainless steel or polished tiles and marble. The strongest formula in the Gard range, depending on surface contamination, one 20l multipack will last approximately 6 8 weeks. Ideal product for even the heaviest deposits Quickly and effectively removes calcium limescale Provides a deep cleaning action to all tiled surfaces