How to Easily Fix Dimples in Epoxy Resin

To fix dimples in epoxy resin, use a heat gun or blowtorch to gently apply heat and remove bubbles. Epoxy resin is a popular material used for various applications, including artwork, jewelry making, and furniture.

However, when working with epoxy resin, it is common to encounter dimples or bubbles that can detract from the finished product’s quality. Fortunately, there are effective ways to fix these dimples in epoxy resin. We’ll look at a quick and easy way to get rid of bubbles and give your epoxy resin project a perfect, smooth surface by using a heat gun or blowtorch.

Fix Dimples in Epoxy Resin

What Causes Bubbles in Epoxy Resin?

When it comes to working with epoxy resin, it’s not uncommon to encounter a frustrating issue: bubbles. These small imperfections can occur during the curing process and can detract from the overall beauty and smoothness of your resin piece.

Bubbles in epoxy resin can be caused by several factors, including:

  1. Dust and Debris: Even the tiniest particles can disrupt the curing process, leading to the formation of dimples.
  2. Air Bubbles: If air bubbles are present in the resin when it is poured or mixed, they can create dimples as the resin cures.
  3. Incomplete Mixing: Properly combining the resin and hardener is crucial to achieve a smooth finish. Inadequate mixing can result in dimples and other surface irregularities.

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Effects Of Dimples in Epoxy Resin

Dimples in epoxy resin can have a significant impact on the appearance and quality of your finished project. They can:

  • Create uneven surfaces: Dimples can disrupt the smoothness of the resin, causing an uneven and bumpy texture.
  • Distract from the design: If your epoxy resin piece features intricate designs or vibrant colors, dimples can draw attention away from these details and make them less pronounced.
  • Affect clarity and transparency: In clear epoxy resin projects, dimples can reduce the clarity and transparency, obscuring the depth and brilliance of the resin.

Importance Of Fixing Dimples in Epoxy Resin

Fixing dimples in epoxy resin is crucial for several reasons:

  • Enhanced Aesthetics: By addressing and fixing dimples, you can restore the smooth and glass-like finish of your resin piece, enhancing its overall visual appeal.
  • Improved Durability: Dimples can weaken the structural integrity of the resin, making it more susceptible to damage or cracking. Fixing the dimples ensures a stronger and more durable final product.
  • Professional Presentation: Whether you are creating resin artwork for yourself or for selling, a flawless finish reflects your skills and attention to detail. Fixing dimples helps present your resin piece in a professional and attractive manner.

Preparation For Fixing Dimples in Epoxy Resin

If you’re looking to fix or reduce the appearance of dimples, here are some general suggestions:

Inspecting The Resin Surface

Before you begin fixing dimples in epoxy resin, it is important to inspect the resin surface carefully. Look for any imperfections, such as small pits or holes, that may have caused the dimples.

These imperfections can be caused by contaminants like dust or air bubbles trapped in the resin during the pouring process. By identifying the underlying cause, you can ensure a successful fix.

Gathering The Necessary Supplies

Once you have inspected the resin surface, it’s time to gather the necessary supplies. Here’s a list of tools and materials you will need for fixing dimples in epoxy resin:

  • Epoxy resin (clear or colored, depending on your project)
  • Wooden sticks or toothpicks
  • Sanding paper (fine-grit)
  • Isopropyl alcohol (to clean the resin surface)
  • Disposable gloves
  • Microfiber cloth or lint-free paper towels
  • Heat gun or torch (to remove air bubbles)
  • Mixing cups and stir sticks
  • Leveling tool or scraper
  • Plastic wrap or silicone mold release spray (optional)

Creating A Proper Work Area

To successfully fix dimples in epoxy resin, it is essential to create a proper work area. Follow these steps to ensure an optimal working environment:

  1. Clean and clear a flat surface that is well-lit.
  2. Protect the work surface with a plastic sheet or old newspapers to prevent any accidental spills or stains.
  3. Ensure good ventilation in the area to prevent the buildup of resin fumes.
  4. Wear disposable gloves to protect your hands and avoid leaving fingerprints on the resin surface.
  5. Keep a microfiber cloth or lint-free paper towels handy for wiping away excess resin or cleaning tools during the process.

Techniques To Fix Dimples in Epoxy Resin

Dimples in epoxy resin can be frustrating, but there are several techniques you can use to fix them.

Sanding The Resin

Sanding the resin is a simple and effective way to fix dimples. To begin, gather sandpaper with a grit between 320 to 400. Start by wetting the sandpaper to prevent clogging, then gently sand the area with the dimples in a circular motion. The aim is to level the surface without damaging the surrounding resin.

Filling Dimples With Epoxy

If sanding does not remove the dimples completely, consider filling them with more epoxy. First, clean the dimples with a cloth and acetone to remove any residue.

Then, mix a small amount of epoxy resin according to the manufacturer’s instructions. Use a toothpick or small brush to apply the epoxy directly onto the dimples, ensuring they are completely filled. Allow the epoxy to cure and then sand the area gently to achieve a smooth finish.

Using A Heat Gun

An alternative technique to fix dimples is by using a heat gun. Start by setting the heat gun to a low temperature. Hold the gun approximately 6 inches away from the dimpled area and apply heat in a circular motion. As the heat gun warms the epoxy, the dimples should start to disappear.

Be careful not to overheat the resin, as this can cause more damage. Allow the resin to cool and then inspect the area. If necessary, repeat the process until the dimples are completely eliminated.

Applying A Topcoat

If the dimples are superficial and do not affect the structure of the resin, applying a topcoat can provide a smooth and glossy finish. Mix a small amount of epoxy resin for the topcoat, following the manufacturer’s instructions.

Using a clean brush, carefully apply the epoxy in thin, even layers, making sure to cover the entire surface of the resin. Allow the topcoat to cure according to the instructions provided, and admire the flawless finish of your epoxy resin project.


Fixing dimples in epoxy resin is a relatively simple process that can be done by following a few key steps. By carefully sanding the area, applying heat, or using a self-leveling agent, you can effectively eliminate those unsightly imperfections. For best results, take your time and work in an area with good ventilation.

With a little patience and the right techniques, your epoxy resin project will be smooth and flawless. So go ahead and give it a try – you’ll be amazed at the difference it can make!