Things You'll Need
Plastic paint scraper
All-purpose household detergent
String or sponge mop
One of the advantages of coating your garage or utility room floor with a super-hard resin like epoxy is that cleaning it is a breeze. You can't use just any cleaner, though. Acidic cleansers, such as vinegar or lemon juice, can etch the finish and dull it, and strong alkaline cleaners, such as ammonia, can be equally damaging when used in a concentrated form. The good news is that you seldom need anything stronger than mild detergent. Epoxy isn't indestructible, so you should always avoid brushes with hard bristles when you need to scrub.
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Sweep the floor with a broom, or, if the floor is in a garage or utility area, clear the dirt with a blower. If it has been a while since you cleaned your garage or utility room floor, you may want to spray water over it prior to mopping to loosen caked-on dirt.
Scrape off any large dirt deposits that don't loosen with water, using a plastic paint scraper or a squeegee. If you use a squeegee with a metal frame, ensure the corners of the frame are rounded, and avoid using scrapers with metal blades; metal can scratch the finish.
Prepare a cleaning solution by mixing 1/2 cup of mild detergent, such as all-purposed household cleaning detergent or dish detergent, in a gallon of hot water. Because it is mild, dish detergent is recommended. You can also use a weak ammonia solution -- 1 or 2 ounces per gallon of hot water.
Mop the floor with a string or a sponge mop. Spread the cleaning solution liberally, then use the mop to rub dirt out of the floor. If you need to scrub, use a brush or push broom with moderately stiff plastic or fiber bristles.
Wring out the mop and dry the floor with it, rinsing the mop again with clear water to remove soap residue. Mop up excess water; then allow the floor to dry completely before walking on it.
If the epoxy coating is new, be sure it has completely cured before washing it. Check the curing time on the epoxy container.
Epoxy floors tend to be slippery even when they are dry, so walking on one when it's wet can be very hazardous. Wait for the floor to dry.
Chris Deziel is a contractor, builder and general fix-it pro who has been active in the construction trades for 40 years. He has degrees in science and humanities and years of teaching experience. An avid craftsman and musician, Deziel began writing on home improvement topics in 2010. He worked as an expert consultant with eHow Now and Pro Referral -- a Home Depot site. A DIYer by nature, Deziel regularly shares tips and tricks for a better home and garden at Hunker and Family Handyman.