MasonrySaver All-Purpose Heavy Duty is a penetrating water repellent. If grit were added, it would not penetrate with the water repellent and would not be able to "bond" with anything. This product does not have enough solids to support the addition of any type of grit. If you need to add grit consider an acrylic or other film-forming type product.
Posted by DTEPStore on 10/31/2014 to Masonary Saver