Jan 16, 2025

Why Are There Bubbles in Resin and How to Get Rid of Them?🔵

Bubbles in resin are one of the most common challenges artists face, and they can affect the final outcome of your project.

Understanding why bubbles form and how to eliminate them can help you achieve flawless resin creations.

Why Do Bubbles Form in Resin?

Bubbles can appear in resin for several reasons, including:

Mixing Process: When resin and hardener are mixed together, the process often introduces air into the mixture. Vigorous stirring or improper mixing can create a lot of bubbles.
Environmental Factors: Cold temperatures can make resin thicker, trapping air bubbles and making them harder to escape. Humidity can also contribute to bubble formation.
Porous Materials: When resin is applied to porous surfaces like wood or concrete, air trapped in the material can escape and form bubbles in the resin.
Improper Pouring: Pouring resin too quickly or from a great height can introduce air into the mixture.
Embedded Items: If you embed objects like flowers, paper, or beads, air trapped inside these items can release into the resin.

How to Prevent Bubbles in Resin?

Preventing bubbles from forming is easier than trying to remove them later.

Here are some tips to minimize bubbles during the resin process:

1. Mix Slowly and Thoroughly:

Mix the resin and hardener slowly in smooth, circular motions.
Scrape the sides and bottom of the mixing container to ensure even mixing without trapping excess air.

2. Work in a Warm Environment

Keep the workspace at a temperature between 22-25°C (72-77°F). Warm resin has a lower viscosity, allowing bubbles to escape more easily.

3. Seal Porous Surfaces:

Apply a thin layer of resin (Crystal Epoxy Resin is ideal for sealing) or a sealant to porous surfaces before pouring the main layer. This prevents air from escaping into the resin.

4. Preheat Resin:

Place resin bottles in warm water for 5-10 minutes before mixing. This reduces viscosity and helps bubbles rise to the surface.

5. Pour Gently:

Pour resin slowly and close to the surface to minimize air introduction.

How to Remove Bubbles in Resin?

If bubbles still form, don’t worry! Here are effective ways to eliminate them:

1. Use a Heat Gun or Torch:

Pass a heat gun or torch over the surface of the resin to pop bubbles. Move the heat source quickly to avoid overheating.

2. Use a Toothpick:

For small, stubborn bubbles, use a toothpick or pin to gently pop them.

3. Alcohol Spray:

Spritz the surface with isopropyl alcohol (91% or higher). This helps bubbles rise and pop without damaging the resin.

4. Vacuum Chamber:

For professional-grade results, a vacuum chamber can remove bubbles from the resin before pouring.

5. Time and Patience:

Allow the resin to sit for a few minutes after mixing. Many bubbles will rise and pop on their own.

When Bubbles Persist: Common Mistakes and Solutions

If you’ve followed all the tips above and still see a significant amount of bubbles in your resin, it could indicate one of the following issues:

1. Incorrect Mixing Ratios: If the resin and hardener are not mixed in the correct proportions, it can lead to improper curing and excessive bubbles. Always measure carefully according to the manufacturer’s instructions.

Crystal Epoxy Resin - 2:1 (by weight)
Honey and Extra Honey Epoxy Resins - 2:1 (by weight)
Wood PRO - 3:1 (by weight)

2. Exceeding the Recommended Pour Volume: Pouring too much resin at once can cause overheating, which creates bubbles. Stick to the recommended layer thickness for the resin you’re using.

Crystal Epoxy Resin - Pour thickness up to 15 mm
Honey and Extra Honey Pour thickness up to 15 mm
Wood PRO - Pour thickness: 50-60 mm

3. Using the Right Type of Resin: Different types of resin are designed for specific applications:

Crystal Epoxy Resin: Ideal for sealing porous materials like wood, thanks to its low viscosity, which allows bubbles to escape more easily.
Wood Epoxy Resin: Best for deep pours and large projects, as it cures slowly and minimizes overheating.
Honey and Extra Honey Resins: Perfect for thin layers and artistic applications, offering a thicker consistency for better control.