Polyaspartic vs Epoxy Garage Floor: Cure Time, UV and Cost

Polyaspartic generally cures faster than epoxy and holds its colour in sunlight, but it costs more, around 20 percent in one source. Epoxy is cheaper and has a long track record. Figures vary by product and temperature, and most sources are installers, so use the manufacturer's data sheet for the product you are quoted.

Side by side

The comparison table

Factor	Epoxy	Polyaspartic
Cure time	One installer: at least three days. Another: about 12 hours or more before foot traffic and 72 hours before vehicles	One installer: about 24 hours. Another: foot traffic in about two hours, vehicles in 24 hours
UV	Epoxy is generally the one that yellows	Holds colour and does not yellow, in the sources we read
Cost	Cheaper	About 20 percent more in one source
Hardness	One forum post: 100 percent solids epoxy tests about 80D to 90D	The same post: polyaspartic about 70D to 80D, disputing the claim that it is harder
Cold weather	One source says epoxy can take 24 to 36 hours in cold conditions	The same source says polyaspartic cures in 2 to 4 hours in cold conditions

Where the numbers come from

The cure-time and cold-weather figures come from North American sources. The Green Building Canada article describes Canadian temperatures, so do not apply its numbers to a NSW garage. In the sources we found, cure times depend on temperature, humidity, slab moisture and the exact product.

Cure time

Why it matters for a garage

A garage is often the household's only parking, so how soon you can drive on the floor affects the whole job. Installers who sell polyaspartic stress the one-day return to service. Installers who sell epoxy point to its lower price and long track record.

How to turn the figures into a plan

Ask for the cure schedule in writing at the temperature your installer expects on the day: when you can walk on it, when you can drive on it and when you can wash it. A schedule you can hold the installer to is worth more than a headline figure.

UV and appearance

Yellowing

The sources say epoxy is generally the one that yellows and polyaspartic holds its colour. For a garage with a door that stays open in the sun, that matters more than for a closed shed.

Gloss and finish

Neither source gives a measured gloss comparison. Judge finish from a sample board in your own light, not from a brochure.

They are often used together

Epoxy base, clear topcoat

Some systems use both. One Sydney installer says a UV-resistant polyaspartic clear coat is usually the best choice over a metallic epoxy floor, so the epoxy layer carries the look and the polyaspartic layer sits on top.

Commercial pricing

In a Melbourne contractor's pricing note, fast-curing polyaspartic or MMA coatings carry a 20 to 40 percent premium over standard forklift-grade epoxy, which is a commercial rather than a domestic price.

Hardness and durability

What the sources disagree on

One forum post disputes the idea that polyaspartic is harder. It reports epoxy at about 80D to 90D and polyaspartic at about 70D to 80D. A forum post is not a test report, so treat the claim as unproven either way.

What to ask instead

Ask the installer which product they will use, whether it has a data sheet with hardness and abrasion figures, and what the warranty covers and excludes.

Questions to put to an installer

The five to ask

• Which product, and can I see its data sheet?
• What is the cure schedule at today's temperature before I can walk and drive on it?
• Which layer is the topcoat, and is it UV stable?
• What preparation is included, such as diamond grinding?
• Has the slab been tested for moisture? See moisture barriers for epoxy floors.

Why moisture comes up every time

A resin coating can fail from slab moisture whichever resin it is, so the preparation questions matter as much as the resin choice.

Find installers

NSW Flooring lists 56 businesses with a confirmed epoxy service from Google Maps, retrieved 22 October 2026. Examples: epoxy flooring western sydney, epoxy flooring south west sydney and epoxy flooring newcastle & hunter. The listing does not say which resins a business uses, so ask. For the epoxy-versus-concrete question see epoxy vs polished concrete for a garage floor, and for prices see epoxy flooring cost in NSW. See how this directory collects data.

Quick answers

Is polyaspartic harder than epoxy?

Sources disagree. One forum post reports lower hardness numbers for polyaspartic, so treat the claim as unproven.

Is it a one-day floor?

Some installers say so. The cure time depends on the product and conditions, so ask for the schedule in writing.

Does polyaspartic cost more?

About 20 percent more in one source, and 20 to 40 percent more for commercial systems in another. Both are installer figures, not NSW averages.

Can I put polyaspartic over existing epoxy?

The sources we found do not say. Ask the installer and the manufacturer.