activ8 is a unique, revolutionary new stone Cleaner & renderwash which offers the highest performance at economical levels whilst still being gentle enough to the substrate. activ8 will remove all general soiling marks, algae deposits, hard to remove stains, greasy deposits and moisture related spots. activ8 stone cleaner is designed to be used for exterior works only is to be used when cleaning stone and render, monuments, paving stones, decking, terracotta, fences and can also be used on tennis courts.