HG protective coating for natural stone (HG prodotto32) is a special pre-treatment for marble and other natural stone such as limestone, granite, travertine, granite, etc., but it is also very suitable for outdoor concrete tiles containing fragments of natural stone such as granite and marble composite. This unique product penetrates deep into the pores of natural stone to halt the action. This prevents the penetration of dirt and grease stains, while leaving the original character of natural stone or without sealing the floor from moisture from below, so that it can continue to transpire. Does not contain silicone, dries quickly and is suitable for both indoor and outdoor. Apply the liquid uniformly in the same direction using a paint roller. Leave for 10 minutes, then remove any excess product with a dry cloth and do not drop cloth. A litre is sufficient for 10-50 square metres, depending on the porosity of the floor.