HG 20 Extreme Power Cleaner 1L A professional, extremely strong cleaner for real problem stains such as persistent layers of polish, old layers of polish or heavily ingrained dirt in passageways, stairwells etc. For use on floor tiles (glazed & unglazed, including porcelain), flagstones, terracotta, victorian tiles & flagstones. Can also be used on all natural stone including granite, slate & marble etc. Coverage: 35-70 m per litre. Size 1 Litre Dilute HG Super Remover 1:10 (1 litre to 10 litres of water). Using a sponge or mop, apply the solution liberally to the surface to be treated. Scrub the surface well (with a scrubbing machine if necessary). Allow to soak in for a few minutes & scrub again. Then remove the HG Super Remover from the surface with a mop. Wring out & rinse the mop at regular intervals. If necessary use a water vacuum. Finally rinse twice with clean water. If necessary, repeat the treatment. In the case of very stubborn dirt, use a solution of 1:4.