Stringently fabricated using the best quality PVC material for sturdiness, this mould range is the best standards. Designed with high precision, it easily making tiles in various colours as the colour sections in the mould are well defined.Mold growth can occur within the grout used in the spaces between the tiles. Like mold growth in the caulking, this is very difficult to clean. In its natural state, grout is highly porous and will absorb enough moisture to propagate mold growth.