Depending on the size of the brick you wish to make, we may have a few product options to recommend. We recommend contacting our customer service representatives either at 800-282-5828 or online by LiveChat at www.quikrete.com with more information to select the appropriate product.
QUIKRETE® Sand/Topping Mix (No.1103), in conjunction with QUIKRETE® Concrete Acrylic Fortifier (No.8610) replacing half of the required water content, is the combination of products recommended for a shower pan or a mortar bed for shower base or bathtub installation. ANSI 108.1 provides application and material requirements for shower pans and bathtubs. It is critical that the subfloor / structure underneath be rigid. Bathtubs require secure and adequate support because of the combined weight of the tub, person, and water. Please consult and follow local building /plumbing code requirements.
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Your application technique is what we recommend for filling uneven flooring at that thickness. We recommend using QUIKRETE® Concrete Acrylic Fortifier as a partial replacement for the mixing water, particularly in the areas thinner than ½”.
QUIKRETE® Sand/Topping Mix will not bond directly to plywood without mechanical fastening. A water barrier should also be installed over the plywood.
For slab-work at less than 2” thick, we recommend QUIKRETE® Sand/Topping Mix. Once the slabs are 2” or thicker, we recommend one of our quality concrete products instead.
You'll be better off using regular concrete since it should be stronger than the sand/topping mix. Regular concrete is much more appropriate for a 3" thickness. If 1" is as thin as you go, there should be no problem smoothing it out over the aggregate (rocks). If you get down to 1/2", the aggregate will start showing, but I wouldn't go that thin anyway.
Each 60-pound bag of QUIRKETE® Sand/Topping Mix yields approximately 0.5 cubic feet. For an area of 48 square feet, you will need 8 60-pound bags per inch of thickness. Yields will vary with waste, uneven subgrade, etc.
For applications of 1-2” thick, we recommend using a topically applied bonding agent like QUIKRETE® Concrete Bonding Adhesive. This product can be painted onto the existing concrete prior to pouring the new topping.
QUIKRETE® Sand/Topping Mix is a high strength mortar, exceeding 5,000 psi once cured. QUIKRETE® Sand/Topping Mix can be stamped for decorative walk ways.