Rinse the bluestone with lukewarm water. The surface must be free of dust, grease and polish. Allow to dry and rub a bit of the product with a clean cloth. The product will be absorbed in 5 to 10 minutes. Afterwards, you must thoroughly remove the remaining product with a dry cloth (if necessary, with turpentine). Repeat the treatment on highly absorbent surfaces until the product no longer penetrates the surface. (Drying time 4 hours, can take full load after 3 days. 100ml for around 10m2.) Repeat the cleaning task 1 time per year.