Why Does My Epoxy Resin Mixture Feel Hot? - ArtResin

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Once you combine the resin and hardener, a chemical reaction starts to happen that is the beginning of the curing process. As with many chemical reactions. heat is a normal byproduct of this. Heat output is greater with the larger quantities of resin that you use. 

You’ll be happy to know that ArtResin is protected against the yellowing that can be caused by thermal energy, i.e. heat.⚠️ PLEASE NOTE: Pour your resin and hardener mixture as soon as possible after you've finished stirring. Measuring and mixing your resin and hardener should always be your last step, so make sure you have your workstation, tools and artwork prepped before you start. Unless it is spread out over a larger surface area , the resin and hardener mixture will continue to heat up if allowed to sit in the mixing container. This can prompt an exothermic reaction in which the resin heats up very quickly and cures prematurely.

Check out our blog How Can I Avoid getting Dimples In My Epoxy Resin?.

ArtResin:  Made For Artists, By Artists.

About the author: Rebecca Zak

Hi, I’m Rebecca, and I co-founded ArtResin with my husband, Dave. I’m a serial entrepreneur! As an artist and a former teacher, I've been able to leverage my creativity and experience to start multiple business ventures. In fact, there's nothing I love more than seeing a good idea turned into... View all author's articles Recent Articles Shelley Wilfong is our latest ArtResin Winner! December 18, 2025 Top 10 ArtResin Blogs of 2025: Resin Tips & Troubleshooting December 16, 2025 Andrzej Karwacki is our ArtResin Winner! December 11, 2025 Pretty Done is our ArtResin Winner! December 8, 2025 ⛄️ Christmas Resin Craft Ideas - Festive DIY Decor, Gifts & Ornaments to Inspire your Holiday Creativity December 1, 2025 Read All Articles Back to Blog Enter email to join ArtResin’s newsletter Subscribe