Total Etch & Clean is a safe, biodegradable alternative for muriatic acid used to etch and clean concrete, plaster, brick pavers, natural stones, and travertine surfaces being recoated. Total Etch & Clean will safely remove lime, algae, scale, and excess mortar. Total Etch & Clean will improve the surface profile/roughness that will aid in adhesion of cementitious overlays, sealers, paints, and stains, along with impregnators. All chemicals and sealants are FINAL SALE and are not eligible for return, refund, or exchange. Due to the nature of these products, we cannot accept returns once the product has left our facility, regardless of whether the container has been opened or remains unused. Please verify that you are purchasing the correct product and quantity before completing your order. All sales of chemicals and sealants are final.