Should I Mix Epoxy by Hand or Drill?

When mixing epoxy resin, there's one question that comes up often: Should I mix by hand or drill?

The short answer? Hand mixing is usually best for smaller batches, while a drill mixer can be helpful for larger projects. But whichever method you choose, proper mixing technique matters more than speed. Here's how to decide what's right for your next pour. 

Mixing Epoxy Resin by Hand

For most resin artists, crafters, and beginners, mixing epoxy by hand is the easiest way to stay in control. Using a flat mixing stick or silicone spatula allows you to combine your resin and hardener slowly, reducing the amount of air introduced into the mixture. 

Hand mixing works best for:

• Jewelry, coasters, and small resin molds. 
• Tumblers and decorative crafts.
• Small tabletop coatings.
• Small canvas art work coatings.

The key is to stir slowly and consistently, scraping the sides and bottom of your mixing container as you go. 

Pro Tip: Think of folding a cake batter rather than whipping eggs. You want the resin and hardener thoroughly combined without adding unnecessary air.

When Should You Use a Drill Mixer for Epoxy?

Working on something bigger? A drill mixer can make the job easier. For large epoxy batches, manually mixing can become tiring. A properly sized drill mixing attachment can help combine larger volumes more efficiently. 

Drill mixing may be useful for:

• Large river tables.
• Bigger deep pour projects.
• Large surface coatings.
• Projects requiring higher volumes of resin. 

However, there's a catch. Mixing epoxy too quickly with a drill can introduce excess air bubbles into your resin. High-speed mixing can also cause splashing and make it harder to maintain control. 

If your specific formula allows mechanical mixing (all Promise Epoxy formulas do), use a suitable mixing attachment at a slow, controlled speed. Keep the paddle submerged and avoid creating a vortex. Always follow the mixing instructions for your specific resin. 

Hand Mixing vs. Drill Mixing: Which Is Better?

Our recommendation: Start with hand mixing, especially if you're new to epoxy. For larger projects, consider a drill mixer only when recommended for the resin you're using. 

4 Tips for Mixing Epoxy Resin Without Excess Bubbles

Whether you're using a mixing stick or drill, these habits can make a big difference. 

1. Mix slowly, but thoroughly.

Rushing the mixing process can introduce unnecessary air. Focus on a consistent motion rather than speed. 

2. Scrape the sides and bottom.

Unmixed resin or hardener can cling to your container. Scrape regularly to help prevent sticky spots and uneven curing. 

3. Follow the recommended mixing time.

Different epoxy formulas have different mixing requirements. Don't assume every resin needs the same amount of time. 

4. Work at the recommended temperature. 

Cold resin is thicker and can hold onto air bubbles longer. For many Promise Epoxy formulas, a workspace around 70 - 75F is recommended. Always check your specific product instructions. 

The Bottom Line: It's Not About Mixing Faster

So, should you mix epoxy by hand or drill?

For most small resin projects, hand mixing is the better choice. It gives you greater control and helps minimize unnecessary bubbles. For larger pours, a drill mixer can be useful when your epoxy's instructions allow it, provided you keep the speed low and mix thoroughly. 

Remember, properly measured and thoroughly mixed epoxy is the foundation of a successful pour. The right tool simply makes getting there easier. 

Want to improve your mixing technique? Read our guide on How to Properly Mix Epoxy Resin for Better Results.

Ready for your next project? Explore Promise Epoxy and find the right resin for whatever you're making next.