What temperature should I apply epoxy?

In order to use epoxy properly, it’s important to understand how temperature affects the chemistry behind this material.

Epoxy is a two-part adhesive used for bonding a wide variety of materials and fabrics. Each epoxy formulation has its own optimal temperature at which to apply it for the best results.

By following these simple steps, you can ensure your application process is as successful as possible.

Can epoxy be applied in cold weather?

When it comes to working with epoxy in cold weather, you have a lot of options. First, however, it’s important to understand the temperature basics of curing epoxy.

Epoxies cured by a chemical reaction between two parts: the resin and the hardener. These components are catalyzed via an induced change of temperature which triggers the chemical reaction process that changes the liquid components into a solid plastic state.

Once the epoxy sets up and begins to cool, it can no longer be softened or remelted. This is because its molecules have been cross-linked together in new configurations.

As part of this process, heat is released and further contributes to setting up and cooling down the material. The physical properties that define each cured epoxy formulation are derived from how these molecular chains interconnect themselves during this heating/cooling phase period.

What temperature is too cold for epoxy?

Epoxy is extremely temperature sensitive. Using epoxy in temperatures below 50 degrees Fahrenheit will result in the material not fully curing. Epoxies cure faster at higher temperatures and slower at lower temperatures.

The exact setup time depends on the formulation of the epoxy, but almost all can be sped up by increasing the temperature, and all slow down significantly as the temperature drops below 50 degrees Fahrenheit.

All epoxies will cure more slowly at cooler temperatures, so it’s important to factor that into your project planning to avoid costly delays or mistakes caused by a rushed job.

Will epoxy cure at 50 degrees?

Yes, epoxy will cure at 50 degrees, but it will take the curing process longer, which can be inconvenient. It is best to apply epoxy when temperatures are above 60 degrees.

Epoxy will cure in cold temperatures and even below 50 degrees; however, it will take much longer. It usually takes a few days to fully cure at 50 degrees and longer if the temperature is colder than that.

Can you epoxy a garage floor in the winter?

“Can you epoxy a garage floor in the winter?” is one of the most common questions we get asked. The answer is yes, but not without some important considerations.

First, it’s critical to understand your work environment. If your garage can’t get above 50 degrees, you’re going to want to wait until later in the year to apply epoxy. This is because:

  • Epoxy will give you better results if applied at 55-75 degrees (for example, fewer bubbles)
  • The faster epoxy cures, the stronger it will be (again, 55-75 degrees for optimal curing time)

Will epoxy cure at 60 degrees?

When mixing your epoxy and adding pigment to it, you can keep it in a warm place or simply mix it right away. Once you’re ready to apply the epoxy, make sure the surface temperature is always above 60 degrees.

If the surface is warmer than 90 degrees, this is ideal! However, if your surface is colder than 60 degrees (but warmer than 50 degrees), that’s fine too as long as you have plenty of time for curing. Note that below 50ºF epoxy will not cure at all.

If your project has many layers of clear coat (like a bar top with multiple applications) we recommend applying each layer within 24 hours of the previous application for best results. This will ensure that each layer cures completely before adding another one on top of it.

If you are pressed for time and need an epoxy coating to cure faster, use a heat gun set around 100-110ºF and pass over any areas where bubbles seem less likely to pop on their own.

Does temperature affect epoxy curing?

The short answer is yes. Epoxy cures faster in high temperatures, and slower in cold temperatures. But what exactly does that mean? How do you know if it’s too hot or too cold to use epoxy?

Epoxy will cure at temperatures above 50°F, which means that even in the winter, depending on where you live, it could be warm enough to apply epoxy.

You should be aware that when temperatures drop below 50°F your epoxy will cure much more slowly than usual. It can also become more viscous in the cold, making it harder to work with and possibly requiring extra time for mixing.

The good news is that once it’s cured the colder temperature doesn’t affect its strength or performance at all.

The opposite happens when your epoxy gets too hot—it cur

Will epoxy melt in the sun?

Probably not the way you think. For starters, epoxy has a very low heat deflection temperature. This is about the temperature at which a material starts to bend under its own weight—not exactly what you need in an adhesive or coating.

And that’s okay because epoxy isn’t meant to be used this way. Epoxies normally have a very high molecular weight, so they are resistant to thinning out when exposed to heat and sun over time.

How long does it take epoxy to completely cure?

Before I began shopping for epoxy, I had to find out a few things. First, what is it and what does it do? Epoxy is a two-part material that is applied to the surface of an object or in certain cases inside one.

The reason it’s called “epoxy” is because of its properties: it’s hard and brittle until cured. It then becomes flexible and can be molded into almost any shape.

To get an idea of how much space epoxy occupies, consider the fact that if you make a 2-inch diameter sphere from it (about 4 inches around) and fill it with glitter (or other stuff), you’ll need at least 1 gallon for each inch in volume. You’ll be running out of your epoxy pretty quickly!


Since it is such a great product, it is important that you follow the manufacturer’s recommendations to use epoxy at the right temperatures.

The best temperature range for epoxy to be applied is around 70 degrees F. Any lower than this, and your epoxy will become too thick to properly apply with ease. If your room temperature is below 70 degrees F, we recommend using our low-viscosity epoxies which are easier to apply in cooler environments.

Any higher than around 80 degrees F and your epoxy will become too thin and may begin to cure before you have time to mix enough together for larger applications.

Photo of author

Martin Flood

Martin Flood has been working in the construction industry for over 20 years as a general contractor with expertise in remodeling projects that are large or small. He has furthered his career by specializing in epoxy resin flooring, providing excellent service to both commercial and residential clients. Martin’s experience enables him to offer professional advice on how to choose the right type of project based on your needs and budget.

Leave a Comment