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.Unsealed grout, tile and concrete are very porous and therefore susceptible to mold growth. It's very common to see mold growing in the grout between the tiles in a bathroom or kitchen or on the concrete in your driveway.