Published on January 29th, 2013 | by Grant Barnard0
How To Finish a Garage Floor With Epoxy
Finishing your epoxy garage floor requires a better quality paint to stand up to hot tires in the mid summer. If you are finishing a floor that does not receive vehicle traffic with hot tires, please refer to Refinishing a Cement Floor.
- Dry sweep the floor and then rinse clean any loose dirt.
- Power wash or scrub with soap and stiff broom
- Hand scrub any grease spots with dish soap and boiling water to remove oil and grease
- Etch the cement with a muriatic acid solution. DO NOT use this at full strength. The goal is to slightly break up the surface of the cement to create a 100 grit sandpaper feeling. For Safty you must read our article on this step here How To Prep With Muriatic Acid(HCI).
- If ANY grease or oil stains still remain then repeat hand brushing with boiling water.
- OR– You can rent a cement grinder and prep the floor the best way. These can often be rented for cheap but require a bit of elbow grease.
What are The Different Acceptable Coatings for Finishing Garage Floors
- Rubberized Coatings – This a product that is literally rubber dissolved in solvents. It never peels but is expensive. The quality is better than any epoxy coating because its a urethane.
- Epoxy Floor Paint – All epoxy floor coatings are not equal. We only use products from PPG Porter Paints. The best bond and water and chemical resistance will be from a polyaspartic epoxy which will bond better than anything and resist water and salt damage the best.
How To Paint The Cement Garage Floor – Tips
- Test the moisture content of the cement. This is easier than it sounds. Tape a 4mil 12×12 peice of plastic to the floor. Make sure the tape is all the way around the edges. If moisture collects between the plastic or keeps the cement wet. Then it has too much moisture. The temperature greatly affects the time of this test so wait at least 12 hours and use your best judgement. Any amount of moisture is too much.
- Keep a wet edge! This is an important step to achieve a beautiful finished product.
- Use a high quality shed free roller with a solvent resistant core.
- Usually the garage is separated into squares. Work within these squares. One at a time. Cut in the edge of just that square and then roll it out.
This is one of those things that is ALWAYS done wrong on every epoxy garage floor I have ever seen. There is one and only one trick to make it perfect. Use golf shoes with metal spikes and walk on the wet floor. Break up the large flake prior to spreading. Then spread by tossing the flakes straight up so they have plenty of fall time to spread out. If the floor is cool enough to not dry quickly the tiny pinholes will fill back in after you are long gone.