This is our most popular product for a flat, solid, and permanent finish. Masonry Flat is extremely durable, can be tinted to the color of your choice at a local retailer, and lasts 20 years with no peeling or chipping off. It is 2 coat system (no additional primer) for unpainted, absorbent brick or stone. For all other surface types, you must use BioGrip Micro Primer as a first coat, then add 1-2 coats of Masonry Flat.