LTP Tile Grout Stain Remover expertly cleans cement and grout residues, making it a must-have for both interior and exterior tile maintenance. Its effectiveness against mineral salt formations (efflorescence) enhances routine cleaning for most outdoor and hard-wearing tiles, such as ceramic, porcelain, and quarry tiles. Not suitable for sensitive natural stones such as limestone, marble, or granite, or for areas with underfloor heating.