Rent a blasting unit (also called a pot blaster) for a local hardware store. Purchase special special sodium bicarbonate (make sure you get the right kind for your blaster). Following the manufacturer’s instructions, add the sodium bicarbonate to the blaster. Use the machine to “blast” the floor. It works very similar to a power washer. Rinse the floor thoroughly with clean water. After the floor dries, use an industrial vacuum to remove any remaining powder or debris.
180-grit sandpaper is a good choice.
You can rent a pressure washer from many home improvement stores or other rental outlets in your area.
Hose down the floor. Mix 1 part muriatic acid with 3 parts water in a plastic bucket. Use a plastic watering can or pressure sprayer to coat the floor with diluted acid. Wait until the acid stops bubbling (about 2-15 minutes).
Some muriatic acid products will not need to be neutralized. Follow the manufacturer’s instructions.
Let this dry for 4-6 hours.
Both products typically contain from 40-60% solids (epoxy). The higher the percentage, the harder your floor will be, and the more expensive the product. You absolutely must use a ventilator to apply solvent-based epoxy products.
Always select a product that is compatible with the epoxy you plan to use.
Solvent-based epoxy products can be harder to find. Some paint specialty stores may carry them, but you may need to visit an industrial-supply store. Water-based epoxy products can be purchased at most home supply stores.
It can help to use an extension handle on your roller. Be careful not to paint yourself into a corner. Remember to wear a respirator and keep the garage door open.
Epoxy kits are pre-measured. Mix all of part A together with all of part B to create the amount of epoxy listed. Most epoxy products (including most primers) have a “bucket life” of about 40 minutes. This means that the product must be applied within this time window before it hardens.
Remember to mix the epoxy immediately prior to application. Move as quickly as you can without being sloppy. Epoxy has a short working time.
Curing time will vary slightly across epoxy products. Read and follow the manufacturer’s directions for the product you select.
If you used sand paper, you may need to do another run with your vacuum to remove any debris.
Add 3–4 fluid ounces (89–118 ml) per every 1 gallon (3. 8 l) of epoxy.
