Common Problems When Working With Epoxy Resin and Ways to Avoid Them

Common Problems When Working With Epoxy Resin and Ways to Avoid Them


Epoxy resin is a popular material used in DIY projects, art, and industrial applications. It is a versatile and durable material that can be used for a wide range of projects, from coating countertops to creating jewellery. However, working with epoxy resin can be tricky, and it's essential to follow proper usage and instructions.

Here are just a few of the Common Problems When Working With Epoxy Resin and Ways to Avoid Them;

Bubbles in Epoxy Resin
Bubbles in epoxy resin can be caused by a variety of factors, such as:
  • Mixing the resin and hardener too quickly or vigorously
  • Applying the epoxy resin in thick layers
  • Trapped air in the surface being coated

How to Avoid Them

Here are just some of the ways to avoid bubbles in epoxy resin:

Mix Epoxy Resin Slowly and Thoroughly To prevent bubbles, mix the epoxy resin and hardener slowly and thoroughly, scraping the sides and bottom of the container as you go. Avoid using a mixer or shaking the container vigorously, as this can introduce air bubbles.

Use a Heat Gun or Torch After applying the epoxy resin, use a heat gun or torch to remove any bubbles that may have formed. Hold the heat source a few inches away from the surface and move it in a circular motion.

Apply Epoxy Resin in Thin Layers To prevent the buildup of air bubbles, apply the epoxy resin in thin layers. This allows the air to escape easily and results in a smoother surface.

Uneven Curing in Epoxy Resin


Uneven curing in epoxy resin can be caused by:

  • Incorrect ratio of resin and hardener
  • Uneven mixing of the resin and hardener
  • Temperature and humidity fluctuations

How to Avoid Them

Here are some ways to avoid uneven curing in epoxy resin:

Proper Ratio of Resin and Hardener Make sure to follow the manufacturer's instructions for the proper ratio of resin and hardener. Using too much or too little hardener can result in uneven curing.

Control Temperature and Humidity Epoxy resin cures best at specific temperature and humidity levels. Follow the manufacturer's recommendations and use a thermometer and hygrometer to monitor the conditions.

Use a Levelling Tool (Scraper) To ensure an even surface, use a levelling tool to spread the epoxy resin evenly over the surface.

Yellowing of Epoxy Resin


Yellowing of epoxy resin can be caused by:

  • Exposure to UV light
  • High temperatures
  • Oxidation

How to Avoid Them

Here are some ways to avoid yellowing of epoxy resin:

Use UV Resistant Epoxy Resin Choose a UV resistant epoxy resin to prevent yellowing over time. This is especially important for projects that will be exposed to direct sunlight.

Keep Epoxy Resin in a Cool, Dark Place Store epoxy resin in a cool, dark place to prevent exposure to heat and light, which can cause yellowing.

Apply a Protective Coating After the epoxy resin has cured, apply a protective coating to prevent yellowing and UV damage.

Poor Adhesion of Epoxy Resin


Poor adhesion of epoxy resin can be caused by:

  • Improper surface preparation
  • Use of incompatible materials
  • High humidity during application

How to Avoid Them

Here are some ways to improve adhesion of epoxy resin:

Proper Surface Preparation Make sure the surface is clean, dry, and free of any contaminants before applying epoxy resin. Sand the surface if necessary to create a rough surface for better adhesion.

Use of an Epoxy Primer Use an epoxy primer to improve adhesion and compatibility with the surface being coated.

Avoid Applying Epoxy Resin in High Humidity High humidity can cause the epoxy resin to cure too quickly and can result in poor adhesion. Avoid applying epoxy resin in high humidity conditions.

Safety Precautions When Working with Epoxy Resin

Safety is of utmost importance when working with epoxy resin. Here are some safety precautions to keep in mind:

Use Protective Gear Wear protective gear such as gloves, safety glasses, and a respirator when working with epoxy resin. This will protect you from skin irritation, eye damage, and inhalation of harmful vapours.

Work in a Well-Ventilated Area Epoxy resin can emit harmful vapours, so it's important to work in a well-ventilated area with plenty of fresh air circulation.

Follow the Manufacturer's Instructions Always follow the manufacturer's instructions for mixing, applying, and disposing of epoxy resin. Improper use can result in serious injury or damage.

Dispose of Epoxy Resin Properly Epoxy resin and hardener can be harmful to the environment, so it's important to dispose of them properly. Follow local regulations for hazardous waste disposal or contact your local waste management facility for guidance.

Working with epoxy resin can be a rewarding experience, but it's important to be aware of common problems and take steps to avoid them. By following the tips outlined in this article, you can achieve beautiful, high-quality results while ensuring your safety and the safety of those around you. Remember to always wear protective gear, work in a well-ventilated area, follow the manufacturer's instructions, and dispose of epoxy resin properly.

Happy Resin-ing !
Jo Ford
Artist & Creator  





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