LTP Mattstone H2O is the water-based version of the bestselling Mattstone sealer, offering the same reliable protection against staining with a low-odour, eco-friendlier formula. It preserves the natural matt finish of stone without altering its appearance and is suitable for interior and exterior use on natural stone, slate, sandstone, limestone, terracotta, quarry tiles and unglazed porcelain. Ideal for enclosed spaces where solvent-based products are impractical.