HG remove veils of cement glue and limestone (HG produced 31) is acid and therefore safely removes cloudiness cement glue and/or lime from marble and other natural stone such as limestone, granite, travertine, granite, etc., but it's also safe for concrete and synthetic tiles that contain fragments of natural stone such as granite and marble composite. Dilute half a litre of product between bucket (5 l) of water. Wet the surface with clean water, then apply the solution using a cloth or a MOP. Do not use more than 10-15 m2 at a time. Brush the surface with a stiff scrub brush or a broom, then leave it for 5 minutes and brush again. Then remove the solution from the surface with a rag, then pass a rag on the floor with clean water.