How cold is too cold for epoxy?

You may have noticed that most epoxies come with instructions telling you not to use them when the temperature is below 50 degrees Fahrenheit.

That’s because cold temperatures slow down the chemical reaction inside of epoxy, which means it will take longer to cure and may never reach full strength.

So, why do some epoxies say a minimum temperature of 60 or 70 degrees? The answer is simple: because there is no single “epoxy”—there are many different formulations, all of which cure at different rates.

Can you do epoxy in cold weather?

Yes, but there are some precautions you’ll have to take. Epoxy requires a certain amount of heat to cure (and high temperatures may accelerate the curing process). When the temperature is below 60F, the epoxy will not cure.

Start by warming up your curing area. Heaters are an easy way to add heat to an enclosed space – but if this isn’t an option for you, try using work lights as a source of heat instead.

Pointing several lights at your project from all angles can help evenly distribute enough heat and get it cured.

How long does epoxy take to dry in cold weather?

Epoxy is a versatile adhesive that sets quickly and hardens to form a strong, waterproof bond. But when it comes to using epoxy in cold weather, there are certain steps you should take, along with specific epoxies that perform better.

  • We suggest keeping the temperature between 65 and 85 degrees Fahrenheit during the entire application process of your project. Going outside of this range can slow down or stop the curing process, or cause other issues like brittleness or chipping which could ruin your project.
  • To warm your workspace if needed, you might consider using a fan heater or similar device to keep things nice and toasty while working with epoxy.

Now that we’ve covered how long it takes for an epoxy resin to cure in cold temperatures, let’s look at some tips on how you can make sure that your next project isn’t slowed down by uncooperative temperatures!

Will epoxy cure at 60 degrees?

Epoxy cures between 70 and 85 degrees Fahrenheit. If you live in a cold climate, it may be difficult to achieve this temperature during the winter. The best way to cure epoxy is to use a heat gun or a small heater.

Does temperature affect epoxy curing?

Epoxy resin is temperature-sensitive, meaning the reaction rate and cure time of the epoxy are affected by how hot or cold it is.

If your epoxy hardens too quickly, you might not have enough working time to get your project done before the product dries up. If your epoxy doesn’t harden at all, well… then you’re in a pickle if you actually wanted it to work!

Don’t worry though: while epoxy resin needs specific temperatures to be able to cure properly, with a few adjustments you can still get great results even when working in extreme temperatures.

Can I use a hairdryer to dry epoxy?

Can I use a hairdryer to dry epoxy? No, don’t do this. A hairdryer is not the right tool for drying epoxy. The heat source will be too far away and too hot, which can actually cause the surface of your project to stick.

Plus, you want to avoid breathing in fumes while the epoxy hardens. Get yourself a heat gun.

What’s the best way to use a heat gun? Keep the heat gun at least 150-300mm (6-12”) from your project, and ideally lower than waist level so that fumes won’t blowback on you or anyone nearby.

Heat guns are usually adjustable up to 600F, but you should only need around 200-300F.

Will epoxy cure at 50 degrees?

“Will epoxy cure at 50 degrees?” You may be wondering. “Will it even cure at 40 degrees? It’s been 6 days since I last mixed up the glue, and I can’t get a feel for whether my project is going to turn out or not!”

The short answer is, yes—your epoxy will definitely cure at 50 degrees. The long answer is that there are many factors that influence how fast your epoxy cures.

50 degrees Fahrenheit is well within the curing range of most epoxies, although it may take longer than a room temperature setting (70–80F). As a general guideline, you can add 5 hours to your curing time if you are working in 40-degree weather.

What happens if epoxy freezes?

If your epoxy gets too cold, it will harden as soon as you add the hardener. Don’t even think of trying to use it—you’ll have to throw it out and start over.

The good news is that almost all epoxies are designed to be used at room temperature, so you shouldn’t have to worry about keeping your product warm.

Just make sure you store your epoxy in a cool, dry place away from direct sunlight or prolonged exposure to heat. Keep it under 70°F when possible, and don’t let either part of the resin/hardener system get above 90°F.

The bad news is that if your epoxy freezes, there’s no way around throwing out the affected batch. If enough has hardened in the container itself, do not try heating it up either dump out whatever can come out or just dispose of the whole thing safely and decant a fresh batch into the clean container (do not mix the old with new).

You won’t be able to use any frozen containers again for mixing parts A/B together because they’re likely damaged beyond repair by ice crystals inside them causing cracks in them.

Be sure to follow these storage protocols regardless of what kind or brand of epoxy you use!

What temperature should I pour epoxy resin?

When using our epoxy resin, you want to make sure that the temperature is between 70F and 85F.

  • If the temperature drops below 70F, the resin will take longer to dry.
  • If the temperature gets above 85F, it will dry too quickly and not cure properly.


The key takeaway is that epoxy needs to be applied above 50 degrees Fahrenheit, or around 10 degrees Celsius.

This doesn’t mean you can’t apply epoxy when it’s any colder than 10 degrees Celsius (or 50 Fahrenheit); it just means that the epoxy’s performance may be diminished, and you’ll have to take some precautions to ensure that it cures properly. Alternatively, you could just wait a few days until the temperature rises again.

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