Hi Jim. Can you provide more information? Is it a bare concrete floor? Do you currently have a coating system? If so, what was used?

Thanks for your feedback.

Hi Robert. We have an article here that explains how to fill contraction joints in the middle of the floor. We also list the various materials you can use and where to purchase them. If you want to fill the expansion joints at the perimeter of the slab, you can do that by applying a self-leveling polyurethane joint sealer, such as SikaFlex SL, after the floor coating is completed.

Hi Ronda. The preferred method for applying new coatings to existing coatings is to degrease the surface and then rough it up via sanding. You can learn the process here. If you are applying a quality coating over an EpoxyShield coating, we highly recommend removing the EpoxyShield first via grinding. The entire coating system is only as good as what it is adhered to. EpoxyShield is a low-budget, low-quality coating that is known for adhesion issues with hot tires. If you are applying a coating within the Rust-Oleum family, then you can apply the Rust-Oleum Recoat Primer providing the current coating is still adhered well and not too worn out. You can learn more about Recoat Primer here. Do not use Rust-Oleum recoat primer if the new coating is not in the Rust-Oleum family.