What does it cost to epoxy a two car garage, DIY vs pro?

A do it yourself epoxy job on a typical two car garage of about 400 sq ft runs roughly $996 to $1,200 in kits, plus about $95 in spreading tools if you do not own them, plus primer if your slab needs it. A professional install is often quoted around $4 to $10 per square foot, or roughly $1,600 to $4,000 for the same garage. Plan on a weekend for the work itself, then a few days of cure before you park on it.

Step one: confirm how many kits you need

Every number in this post starts with coverage. One kit covers 100 sq ft at a target thickness of about one eighth inch. No guessing. No surprises.

• 1 car garage, about 200 sq ft: 2 kits
• 2 car garage, about 400 sq ft: 4 kits
• 2.5 car garage, about 500 sq ft: 5 kits

Measure length x width, divide by 100 and round up. Do not try to stretch three kits over a 400 sq ft floor. A thin coat will not level properly and you end up with streaks. If your garage is an odd shape, our post on how many epoxy kits you need walks through the math.

DIY cost breakdown for a two car garage

These figures assume a standard 400 sq ft two car garage and our indoor quartz sand epoxy self leveling garage floor kit.

Item	What it is	Cost
4 indoor kits, Marble Grey or Desert Grey	Two part epoxy with quartz sand aggregate, $249 each	$996
4 indoor kits, Black (instead of grey)	Same system, $300 each	$1,200
22 inch squeegee with pole	Spreads the coating evenly	$29.99
20 inch defoaming roller	Pops air bubbles while the coat is wet	$39.99
Extension pole	Lets you roll standing up	$24.99
Primer (optional)	Sold separately, not included in the kit	Call us for a quote
Floor grinder or angle grinder with diamond cup wheel	Profiles the concrete before coating	Check local rental rates
Epoxy tool kit (optional)	Tool bag, spiked shoes, five application and finishing trowels	$125

The squeegee, roller and pole together come to about $95. So the core DIY spend lands around $1,091 for grey or about $1,295 for Black, before primer and grinder rental. You will also want a drill with a mixing paddle, concrete cleaner or degreaser, crack filler if needed, and safety gear: nitrile gloves, eye protection and a respirator.

When is primer worth adding?

Primer is strongly recommended for porous concrete, older slabs past the ten year mark, floors that were previously painted or sealed, areas with past moisture issues, and floors that see heavy vehicle traffic. A newer, clean, well ground slab may not need it. If you are not sure, call us and describe the floor.

What a pro install costs

National pro pricing for epoxy garage floors is often quoted around $4 to $10 per square foot, according to HomeServe's epoxy garage floor cost guide, which cites HomeGuide. On a 400 sq ft garage that works out to roughly $1,600 to $4,000.

The gap between DIY and pro is mostly labor and markup. What you trade for that savings is your own time and attention to prep. Not sure if it is a fit? Read can you epoxy your own garage floor first.

The timeline, day by day

A typical job is a weekend: prep and prime on day one, pour on day two.

Day 1: prep and prime

1. Clear the garage completely. Sweep and vacuum.
2. Scrub with concrete cleaner or degreaser, paying extra attention to oil spots. Rinse and let the slab dry fully.
3. Do the water droplet test. Sprinkle water on the floor. If it soaks in within about 30 seconds, the surface can take coating. If it beads up, there is a sealer or contaminant you need to remove.
4. Fill cracks, pits and holes with concrete patch compound or epoxy crack filler and let it cure fully. Never use silicone fillers.
5. Grind the whole floor to a texture like 60 grit sandpaper with an angle grinder and diamond cup wheel or a rented floor grinder.
6. Vacuum every bit of dust. Leftover dust acts as a barrier layer between the concrete and the coating.
7. If you are priming, roll it on thin with a 9 inch roller or squeegee in 10 x 10 ft sections. Do not puddle it. Let it cure per the label, which runs 4 to 24 hours, until it is tack free.

Prep takes about 2 to 6 hours or more. A 500 sq ft garage with staining can take a full day. Our guide states that about 95% of epoxy failures trace back to inadequate surface prep, so this is the day that decides how the floor turns out. For the details on grinding, see grinding vs acid etching for garage floor prep.

Day 2: pour

Check conditions before you open anything. Apply only between 41°F and 90°F, with an ideal cure range of 68°F to 77°F, and relative humidity below 65%. Have all your tools laid out, because pot life is 20 to 30 minutes from the moment mixing begins.

1. Mix one kit at a time with a drill and mixing paddle for 3 to 5 minutes, scraping the sides and bottom. Do not mix by hand.
2. Start in the far corner and work toward the door.
3. Spread with the 22 inch squeegee in 100 to 150 sq ft sections, overlapping 4 to 6 inches and keeping a wet edge.
4. Distribute the quartz aggregate evenly right after pouring.
5. Go over each area right away with the spiked defoaming roller, 2 to 3 slow passes with 50% overlap.

Work early in the day when it is cooler. Heat shortens pot life and adds bubbles. Above 85°F, mix smaller batches.

After the pour: cure milestones

• 24 hours: light foot traffic
• 72 hours: full cure
• About 5 days: heavy traffic and driving
• 7 days: water exposure

Ventilate during application and through the 72 hour cure, but do not aim heat or fans directly at the surface. Keep kids and pets out for those 72 hours. Below 55°F, cure times can double or more, so a cold garage means a longer wait.

Where DIY budgets go wrong

• Buying too few kits. Short coverage means a thin, streaky floor. Buy the full count.
• Skipping the grind. Peeling almost always traces back to oil, grease or sealer left on the slab.
• Parking too soon. Give it the full 5 days before you drive on it.

Planning a job in a specific area? Our epoxy floor kit planning guides by city cover local conditions, and the full installation instructions spell out every step. Phoenix area customers can pick up locally at our Queen Creek shop with no freight charge.

Quick answers

How much does it cost to epoxy a two car garage yourself?

With 4 indoor kits, materials run $996 for Marble Grey or Desert Grey, or $1,200 for Black. Add about $95 for a squeegee, defoaming roller and extension pole if you do not own them, plus primer and grinder rental if your floor needs them.

How much does a pro charge for a two car garage?

National pro pricing is often quoted around $4 to $10 per square foot, according to HomeServe citing HomeGuide. For a 400 sq ft garage that is roughly $1,600 to $4,000.

How long before I can drive on a new epoxy garage floor?

Light foot traffic is fine after 24 hours and full cure is 72 hours. Wait about 5 days before driving or heavy traffic, and 7 days before water exposure.

Can I do the whole job over a weekend?

Yes, a typical job is a weekend: prep and prime on day one, pour on day two. Then allow the cure time before you put the garage back in use.