't Achterhuis has different maintenance products for your bluestone, sandstone or flagstone floor. To impregnate porous floors (sandstone, old terracotta, fired flagstones), we have developed the adequate product in collaboration with the manufacturer. 'Superfix' is easy to apply and user-friendly. To maintain and clean bluestone, we recommend to use a fatty soap based on vegetable oils. Our floor soap is made in a Belgian monastery based on a special formula.