How Long Should Epoxy Sit Before Torching?

Bubbles happen. Even when you mix carefully, tiny air pockets can find their way into your epoxy resin. The good news? They're usually easy to remove. But timing matters. 

So how long should epoxy sit before torching? Here's what you need to know to get a smooth, crystal-clear finish without damaging your project. 

How Long Should You Wait Before Torching Epoxy?

For most tabletop and coating epoxies, you can begin removing surface bubbles immediately after pouring and spreading the resin. You don't need to wait for the epoxy to start curing. 

Once the resin is evenly distributed, make a quick pass with your torch or heat gun, provided your product instructions permit it. Then, check the surface again after approximately 5-10 minutes. Additional bubbles may rise as the epoxy begins to settle. There's no universal waiting period. The ideal timing depends on your resin formula, working temperature, and project thickness. 

Why Does Epoxy Need to Be Torched?

Mixing and pouring epoxy naturally introduces air into the resin. Additional bubbles can also escape from porous materials like wood. A quick application of heat helps surface bubbles expand and pop before the epoxy begins to cure. 

This is especially useful for:

• Tabletop and countertop coatings
• Resin artwork and trays
• Woodworking projects
• Clear epoxy finishes

Keep in mind that a torch primarily addresses bubbles at or near the surface. It won't necessarily remove air trapped deep inside a thick casting.

How to Torch Epoxy Without Damaging It

A little heat goes a long way. Follow these steps:

1. Pour and spread your epoxy. Make sure your resin is evenly distributed before applying heat. 
2. Keep your torch moving. For Promise Table Top Epoxy, hold the flame approximately 6-10 inches above the surface and use quick, sweeping motions. 
3. Avoid overheating. Never hold the flame in one spot. Too much heat can damage the finish.
4. Check for additional bubbles. Inspect your pour after 5-10 minutes and repeat only if needed. 
5. Let your resin cure. Once the surface is clear, protect your project from dust and allow it to cure according to the product instructions. 

Important: Only use an open flame if your specific resin instructions allow it. Keep flammable materials away from your workspace, ensure proper ventilation, and never torch a surface that has recently been treated with alcohol or solvent. For projects where a flame isn't suitable, consider a heat gun or isopropyl alcohol. 

Can You Torch Epoxy Too Late?

Yes! Once epoxy begins to thicken or gel, applying heat becomes less effective and can create surface imperfections. That's why it's best to address bubbles early while the resin is still fluid. 

For many coating projects, you'll want to monitor the surface periodically during the initial working period. Promise recommends checking table top epoxies for bubbles intermittently for up to an hour, using heat as needed. Always follow your particular resin's working-time and application instructions. 

Tips for Preventing Bubbles in Epoxy

The easiest bubbles to remove are the ones you never create. A few simple habits can make a big difference:

• Mix slowly and thoroughly. Aggressive stirring introduces unnecessary air. 
• Work at the recommended temperature. Cold resin can become thicker, making bubbles harder to release. 
• Seal porous surfaces. Wood and similar materials can release trapped air into your pour. 
• Choose the right resin. Some formulas are designed with lower viscosity and improved bubble release. 

Want more tips? Check out our guide on how to get bubbles out of resin.

The Bottom Line

When it comes to torching epoxy, timing is everything. But there's no need to overcomplicate it. For compatible coating resins, start removing surface bubbles shortly after pouring, check back periodically, and stop applying heat once the epoxy begins to thicken. 

And remember, getting a crystal-clear finish starts long before you pick up the torch. 

Start With The Right Epoxy

Less time fighting bubbles. More time making something worth showing off. 

Promise Table Top Epoxy is designed for smooth, self-leveling finishes with excellent clarity and air bubble release. Perfect for tabletops, countertops, and coating projects. 

Shop Promise Epoxy and make your next pour a little easier.