Can You Over Torch Resin? How to Fix Over-Torched Epoxy.

A torch is one of the best tools for creating a smooth, bubble-free resin finish — but is it possible to over torch resin?

The answer is yes. Over-torching happens when a torch is held too close to the resin surface or stays in one spot for too long. Too much heat can cause the resin to react, leading to surface imperfections like dimples, ripples, wrinkles, yellowing, burn marks, flash curing and even damage to your artwork.

The good news is that over-torching is easy to prevent and, in some cases, can be fixed.

Signs You've Over-Torched Your Resin

When resin gets too hot, it can react in ways you don't want. Here are some common signs that your epoxy resin has been over-torched:

Smoking Resin

If the resin starts smoking, stop immediately.  This is a clear sign that the resin is overheating.

Burn Marks

Holding a flame too close can scorch the resin surface, leaving dark, cloudy or damaged areas.

Flash Curing

Too much heat can speed up the curing process too quickly, causing what's known as a flash cure.  When this happens, the resin may cure prematurely or unevenly, resulting in wrinkles, distortion or other surface defects. This can happen from excessive torching, but it can also be more likely in hot environments where the resin may already be curing faster — especially during the summer months.

Damage to Your Artwork

In severe cases, excessive heat can damage the artwork beneath the resin, including photos, paper, paint, and other delicate materials.

Dimples, Ripples & Wrinkles

Instead of curing to a smooth, glass-like finish, overheated resin may develop dimples, waves, ripples or wrinkles across the surface.

Yellowing or Discoloration

Too much heat can cause sections of resin to yellow or become discolored.

How To Avoid Over-Torching Resin

Start with Temperature

One of the easiest ways to avoid over-torching is to start with resin that's at the right temperature. 

1. Cold resin — especially during the winter months — becomes thick and can trap thousands of tiny microbubbles. 

These bubbles won't disappear no matter how much you torch the surface.

This can lead to a frustrating cycle:  you keep torching to remove bubbles, but instead of fixing the problem, you're adding too much heat to the resin, causing surface imperfections and potentially damage to the artwork. 


2. Warm resin — especially during the summer months — may begin curing faster than normal. Adding too much heat with a torch when your workspace or resin are already hot can accelerate the curing process even further, increasing the risk of a flash cure.

For the best results:

✅ Keep your workspace between 75-85°F (25-30°C) before you begin.
✅ Make sure your bottles are at room temperature.
✅ If your resin is cool, warm the tightly capped bottles in a warm water bath before mixing. The idea is to gently warm it, not heat it up.  Warmed resin flows better, releases bubbles more easily, and reduces the need for excessive torching. 

💡 Starting with resin at the right temperature means fewer bubbles to chase, less time spent torching and a smoother finish.

Microbubbles in cold, freshly poured resin

💡 A Lesson Learned The Hard Way

When I first started working with resin back in 2016, I learned all about over-torching and resin temperature the hard way. 

I was resining some of my kids' artwork for a video.  We were in ArtResin's studio basement, in the middle of winter.  Because the resin was too cold, it was filled with microbubbles.

I kept reaching for the torch, trying to get rid of them, but suddenly, the bubbles weren't the problem anymore. The extra heat was.

Before I knew it, the heat from the torch had damaged the photos underneath the resin. The images started distorting and discoloring before my eyes.

⭐️  Take it from me - proper resin temperature matters.  It can save you from chasing bubbles with your torch and accidentally over-torching your project.

Damaged photos — a result of over torching cold resin

Use Your Torch Correctly

For best results:

✅ Hold your torch a few inches above the resin.
✅ Keep it moving at all times, as if you're ironing clothes.
✅ Pass the flame over the resin just long enough to pop surface bubbles.
✅ Avoid repeatedly going over the same area.

When used properly, a torch should gently skim the surface of the resin, not blast it with heat.

⭐️ Remember ... when it comes to torching resin, less is more!

💡 TIP: For more information on how to correctly use and fill both butane and propane torches, see our blog Why Use a Torch to Get Rid of Bubbles in Epoxy Resin?

Can A Heat Gun Overheat Resin?

Yes, a heat gun can also cause resin to overheat if it's used for too long.

While heat guns are generally less effective than a flame torch when it comes to quickly removing surface bubbles.  Because they require more time, they can heat up the resin and increase the risk of flash curing, wrinkling or other surface imperfections.

For most resin projects, we recommend a flame torch because it provides a quick, concentrated burst of heat that releases bubbles efficiently without unnecessarily heating the entire surface.

That said, there are a few exceptions where a heat gun may be a better choice than a flame torch:

✅ Working with flammable materials like alcohol inks, where an open flame can create a safety risk.
✅ Using silicone molds, as a flame torch can damage the silicone or cause it to melt and become fused to the resin.
✅ Creating fluid art effects, such as blending or lacing.  A heat gun's airflow can help move and manipulate the resin. 

⭐️ A heat gun can be a great tool when used with purpose, but just like a torch, the key is knowing when to stop.  

A heat gun is the best choice for this alcohol ink coaster, made in a silicone mold. 


💡 TIP: Learn how to make 3D floral coasters in our blog How to Make Resin Bloom Flower Coasters.

How To Fix Over-Torched Resin

Accidentally over-torched your project? Depending on the damage, you may be able to restore your piece with a fresh layer of resin.

For surface imperfections like waves, ripples and dimples, follow these steps:

1. Sand the Cured Resin

Once your resin has fully cured, sand down the damaged areas using a coarse sandpaper, such as 80 grit.

Sanding does two things:
• It removes the imperfections
• It creates enough texture (or "tooth") for your fresh layer of resin to properly adhere

For best results, sand the entire piece rather than only the affected areas.

2. Clean the Surface

Remove all sanding residue with a damp paper towel. Repeat as necessary to remove all traces of dust - your surface should be completely clean and dry before applying fresh resin.

3. Pour a Fresh Layer of Resin

Carefully measure and mix a fresh batch of epoxy resin, then pour according to the instructions.

Cover your piece and allow it to cure.  With a fresh layer of resin, your project can often be restored to a beautiful, smooth finish.

⭐️  Be aware that large yellowed areas, bad burn marks or damaged artwork may not be repairable.  For this reason, learning proper torching techniques from the beginning is so important.




💡 TIP: Learn more about sanding resin in our blog How to Sand Resin Epoxy Resin.

A torch is one of the best tools for achieving a smooth, professional resin finish - as long as it's used properly.  

Start with properly warmed resin, keep your torch moving, and remember: a little heat goes a long way.

With the right technique, you can use your torch with confidence and create the beautiful, bubble-free finish your project deserves.

💡 TIP: Learn more about how to use a torch on epoxy resin art.

Read our blogs below for more information on troubleshooting epoxy resin. 

• ArtResin’s Troubleshooting Guide
• Tips To Prevent Bubbles
• Can I Fix Small Imperfections In My Resin?
• Is It Possible To Overstir My ArtResin?
• How Do I Remove Epoxy Resin Drips?
• Epoxy Resin Not Hardening
• How To Fix Soft, Sticky Spots In My Resin
• How Can I Avoid Getting Dimples In My Epoxy Resin?
• How To Reduce Dust Before Your Resin?
• How Can I Get Rid Of Bubbles In My Cured Resin?
• How Can I Prevent Dust From Getting In My Wet Resin?
• How Can I Deal With Epoxy Resin Drips After They've Dried?
• What Happens If I Over Torch Resin?
• Why Does My Resin Look Cloudy?
• Why Is My Epoxy Resin Still Sticky?
• Why Is My Resin Bendy?
• Why Are There Bare Spots In My Cured Resin?
• What Does Silicone Do To Resin?

ArtResin: The Original Epoxy For Resin Art.