Common Mistakes When Using Epoxy Resin

When working with epoxy resin, beginners can sometimes encounter frustrating results due to small but crucial errors. Here are the most common mistakes — and how to avoid them:

⚖️ Incorrect Resin-to-Hardener Ratio
One of the most important factors in using epoxy resin successfully is getting the mixing ratio right.

• Always measure carefully using volume or weight as instructed by the manufacturer.
• Using the wrong ratio can result in resin that doesn’t cure properly, remains soft or sticky, or never sets at all.

🌀 Insufficient Mixing
Even with the correct ratio, improper mixing can ruin a project.

• Stir slowly and thoroughly for the recommended time.
• Scrape the sides and bottom of your mixing cup as you go.
• Consider double mixing: transfer the resin to a second cup and stir again to ensure complete blending.

🌬️ Working in Unsuitable Conditions
Environmental conditions can have a big impact on your outcome.

• Work in a well-ventilated space to avoid fume buildup.
• Avoid working in extreme temperatures (too hot or too cold).
• High humidity can interfere with curing and cause blushing or surface imperfections.

💧 Adding Moisture or Contaminants
Moisture and dust are the enemies of epoxy resin.

• Keep your workspace dry, clean, and dust-free.
• Avoid using porous materials or moulds that may release trapped moisture.
• Use clean, dry tools and containers for best results.

🫧 Ignoring Bubbles
Air bubbles are common, but they shouldn’t be ignored.

• Bubbles can form during mixing or pouring.
• Use a heat gun, torch, or even a straw to carefully remove them from the surface after pouring.
• Work slowly and pour carefully to minimize air entrapment.

🧽 Improper Surface Preparation
A poorly prepared surface can lead to poor adhesion or a blotchy finish.

• Clean your surface thoroughly — remove dust, oil, moisture, or debris.
• Ensure it's completely dry before applying resin.

⏱️ Rushing the Process
Patience is key with epoxy resin.

• Don’t rush the pouring, curing, or demoulding process.
• Let the resin cure for the full recommended time — even if it feels hard to the touch.
• Disturbing your project too soon can ruin the finish or weaken the structure.

📏 Overloading the Resin
Bigger isn’t always better.

• Pouring too much resin at once can cause overheating, extended cure times, or even cracking.
• Stick to the recommended pour depth for your resin product, and pour in layers if needed.

✅ Quick Tips for Success

• Follow instructions to the letter
• Test small before committing to large projects
• Keep your tools and workspace clean
• Respect your resin’s limits — in temperature, depth, and time

By avoiding these common mistakes, you’ll have a much smoother and more rewarding experience with epoxy resin