The Kerakoll Cleaning Sponge is for cleaning grout residue off tiles when grouting. The Kerakoll Cleaning Sponge is made from cellulose – a material that is especially suitable for cleaning off residues when using Kerakoll Epoxy Grouts. It can also be used with the Kerakoll range of cement-based grouts. Please note that this is a replacement sponge; the handle is sold separately.