Common Epoxy Mistakes and How to Fix Them
Common Epoxy Mistakes and How to Fix Them
Even with the best preparation, unexpected issues can pop up during an epoxy project. Fortunately, many of the most common problems are fixable. Here’s a quick guide to troubleshooting some of the most frequent epoxy mistakes.
1. Air Bubbles
Bubbles are the most common issue you’ll face with epoxy. They are typically caused by air trapped in the mixture or by gases released from the concrete. The key to fixing them is to act fast, within 10-15 minutes of pouring the epoxy.
Heat Gun or Torch: Gently pass a heat gun or torch about 6 to 8 inches above the surface. The heat causes the bubbles to rise and pop.
Spiked Roller: Use a spiked roller to release any bubbles that are still trapped.
Needle: For large, stubborn bubbles, use a needle to prick them, then smooth the area with a squeegee.
2. Uneven or Lumpy Coats
If your epoxy cures with an uneven or lumpy surface, you can still achieve a smooth finish. The best way to prevent this issue is by ensuring a level surface from the start, often with a concrete grinder. If you have to fix a cured floor:
Grind the Surface: Wait 24 to 48 hours for the epoxy to fully harden. Then, use a concrete grinder to grind down the lumps and create a level surface.
Clean and Recoat: Vacuum all dust and clean the surface. Then, apply a fresh, thin layer of matching epoxy to create a smooth, consistent finish.
3. Yellowing
Yellowing is caused by UV exposure. Over time, sunlight can make your clear or lightly colored epoxy turn yellow. The best way to prevent this is by using a UV-stable coating, such as polyaspartic. While all epoxy will eventually amber slightly with UV exposure, a polyaspartic topcoat can significantly delay this process. For areas with a lot of sun, consider a UV-resistant coating from the start.
Pro Tips to Avoid Failures
Proper Prep: Always clean and grind the surface with a concrete grinder before applying epoxy to ensure proper adhesion.
Mix Thoroughly: Follow the product's mixing instructions precisely. Improper mixing is a major cause of failure.
Temperature Control: Work in a temperature-controlled environment, ideally between 70-80°F, to ensure proper curing.
By knowing how to fix and prevent these common mistakes, you can achieve a professional and beautiful result every time.
