Planning to coat your garage, basement, or workshop floor with epoxy? It’s a solid choice, tough, low-maintenance, and great-looking. But before you break out the roller, make sure the surface is properly prepped. That step makes all the difference.
Here’s the thing, epoxy doesn't forgive a bad base. If your concrete isn’t clean, smooth, and ready, the coating won’t stick right. It might peel, bubble, or wear out way too soon. So let’s break it down into simple, no-fluff steps to get your floor ready the right way.
1. Clear Everything Out
First up, remove anything and everything from the floor. Tools, boxes, old shelves, even wall hooks that might drip dust or oil. Give yourself a clean slate. You don’t want to be dodging stuff later or dealing with flakes falling from overhead storage.
2. Check for Moisture
This part’s important. Epoxy and moisture don’t mix. To test, tape a plastic sheet to the floor and leave it overnight. If it fogs up underneath, the concrete is still breathing moisture, and epoxy won’t bond well. You may need a moisture-blocking primer or a different coating altogether.
3. Degrease and Clean
Concrete absorbs oil and grime. A standard mop and soap won’t cut it. Use a degreaser to lift out stains and scrub with a stiff brush or power washer. Rinse well, and don’t rush drying. The cleaner the floor, the better the bond.
4. Grind!
This is what gives epoxy something to grip.
No floor grinder? Rent one.
Don’t skip this step, it can double the life of your floor.
Can’t get on your hands and knees? Acid etch the surface instead (Grinding Recommended).
Either way, aim for a texture like 120-grit sandpaper, that’s your sweet spot.
5. Patch the Cracks and Holes
Got chips or cracks? Fill them before you coat. Epoxy shows every little flaw if the surface isn’t even. Use a patching compound that’s made for concrete. Let it dry fully, don’t try to coat over wet or soft filler.
6. Let It Dry, Completely
Moisture hiding in the concrete can wreck a good epoxy job. Let the floor dry for at least 24-48 hours, depending on your local weather. In Canada, with cooler temps, give it even more time if needed.
7. Do a Final Sweep
Once everything’s dry, give the floor one last sweep or vacuum. You want zero dust or dirt left behind. Even small particles can keep epoxy from bonding right.
Final Tip
If this is your first time doing epoxy, consider starting with a small area, or bring in a pro for help. Prepping takes work, but skipping steps can cost you down the line.
Want to make your floor last and look great? It all starts with good prep. Get it clean, dry, and smooth, and your epoxy coating will thank you for years to come.