Polyaspartic garage floor in South Florida

How soon you can walk and park on it

The Sikafloor-515 polyaspartic topcoat data sheet (June 2021 version) lists foot traffic after about 4 hours¹ at 68 F, light traffic after about 8 hours¹ and full cure after about 5 days¹. A garage-market base coat sheet, ArmorPoly 80, lists a tack-free time of 2 to 4 hours² and vehicle traffic after 24 hours², at 72 F and 50% humidity.

These are the makers' figures (vendor data), from different products. They are not a head-to-head test, and temperature and humidity move them. Put the wait for cars in hours in your written scope.

What a polyaspartic garage floor is and when it fits

Polyaspartic is a fast-curing coating. It is often sold as a clear topcoat over a base coat of epoxy or polyurea. That mix is called a hybrid system. Ads use polyaspartic and polyurea as near-synonyms, so ask for the product name and its data sheet.

A fast cure is the main reason people choose it. One topcoat sheet lists about 4 h to foot traffic and about 5 days to full cure at 68 F ¹. A garage-market base coat sheet lists vehicles back after 24 h at 72 F and 50% humidity ².

It fits when you want the garage back soon, or when your weather window is short. It fits poorly when the slab is damp, because the same moisture limit applies, or when a tight schedule is hard to keep. The readiness score is a quick way to see where you stand.

Prep: the same slab rules with less time to fix mistakes

Polyaspartic needs the same clean, rough, dry slab as epoxy. The topcoat sheet calls for shot-blasting to a concrete surface profile (CSP) of 3 to 4 ¹. It also caps slab moisture at 4% on a Tramex meter ¹.

A fast-curing coat leaves little time to fix a mistake. Cracks, dust and old sealer have to be dealt with before the first coat and not during it (our reading). Ground moisture can rise through a slab on the ground, so the moisture test is not optional ³.

The prep guide lists what to ask for in writing.

Humidity and dew point: a tighter window

The limits below come from the polyaspartic sheets we read. They are the makers' numbers (vendor data), not independent tests.

• Air humidity: no higher than 75% during the work and the cure ¹.
• Dew point: the slab must stay at least 5 F above it ¹.
• Slab moisture: 4% or less on a Tramex meter ¹.
• Temperature: the garage-market base coat sheet allows application from 30 F to 90 F ².
• Recoat: that base coat sheet lists a window of 2 h to 12 h ².

The epoxy sheet we read allows humidity up to 85% ⁴, so the polyaspartic cap is tighter. On a South Florida summer morning that can make a day that fits epoxy too humid for polyaspartic (our reading, based on the sheets).

The recoat window is short. A hybrid system can need its next layer within hours, and a storm or a muggy morning can end the day. Ask for a fallback date and for who pays for a return trip. The city pages set NOAA dew point normals next to this margin ¹, for Miami and West Palm Beach. Airport air is not your slab, so the reading in your garage decides.

How the job goes on site

These are the steps in a typical hybrid job. Your written scope sets the details.

• Check the slab. Start with photos, then a moisture reading and a look at cracks, old coating and drainage.
• Prep. Shot-blast or grind to the profile the sheet names, fill cracks and vacuum the dust.
• Check the day. Read the humidity, the slab temperature and the gap to the dew point against the polyaspartic limits, not the epoxy ones.
• Base coat. It is usually epoxy or polyurea, spread and rolled out. Ask which one.
• Topcoat. The clear polyaspartic layer goes on inside the recoat window.
• Cure. Foot traffic comes first, then light use, then cars. The sheets list those waits at set temperatures ^{1 2}. Your garage will not match the test conditions, so the wait for cars goes in your scope, in hours.
• Check the result. Ask for photos of the prep and of the finished floor.

Durability: what is claimed and what is tested

Makers market polyaspartic topcoats for hot-tire marking resistance and UV stability ¹. One garage-market sheet also calls its base coat UV stable ². We found no independent test of either claim.

An installer blog says polyaspartic holds up better in Florida heat, humidity and UV ⁵. The post is promotional and gives no test data or failure rates, so we treat it as a claim.

A fast cure is a fact on the sheets. A longer life is not shown. Ask what the warranty says about hot-tire marks, impact and fluids.

What a polyaspartic floor costs: the method

Price is floor area times a rate per square foot, plus extras. The rates below are national ranges, not South Florida quotes. A hybrid system has a base and a topcoat, so ask what each layer costs.

Step 1, measure. Length times width, in feet. The sums below assume 400 sq ft, the low end of Thumbtack's two-car size ⁶.

Step 2, pick a rate range. A kit seller (vendor) estimates professional installs at 7 USD per sq ft⁷ to 12 USD per sq ft⁷. It sells do-it-yourself kits, so it is not an independent guide. We found no recent independent guide that prices polyaspartic per square foot, so this is the only rate shown.

Step 3, multiply the area by each rate.

• Kit seller (vendor): 400 sq ft x 7 USD per sq ft⁷ and x 12 USD per sq ft⁷ = $2,800 to $4,800 (our arithmetic).

Step 4, add extras. A slab that tests wet may need moisture mitigation, which This Old House lists at 2 USD per sq ft⁸ to 10 USD per sq ft⁸. We found no sourced rate for grinding or crack repair.

The epoxy and polyaspartic ranges overlap, so price alone does not decide the choice. Compare the scopes line by line. The cost guide shows more sources.

Care and cleaning

Follow the care sheet for your product. Until you have it, treat these as general habits and not a maker's rules.

• Blow or sweep off loose grit before you wash.
• Skip abrasive pads and harsh solvents unless the care sheet allows them.
• Clean up fluid spills soon.
• Do not drag heavy items across the floor.

What to have in writing

Ask for these in writing:

• The product in each layer, with its data sheet.
• The recoat window, the fallback date and who pays for a return trip.
• The humidity and dew point cut-offs for a start.
• The wait before cars go back in.
• The warranty term and its exclusions.

We are lining up one local installer. We will publish their workmanship term here once it is signed.

National price ranges for polyaspartic garage floor

Polyaspartic garage floor in South Florida: cities

• Polyaspartic garage floor in Miami
• Polyaspartic garage floor in West Palm Beach

Questions people ask