Epoxy resin is one of the most popular materials used in resin art, DIY projects, furniture making, and flower preservation. If you’re searching for clear answers to common epoxy resin questions, our epoxy resin FAQ guide covers everything you need to know before getting started.
From safety and curing times to bubbles and yellowing, this guide answers the most frequently asked questions about epoxy resin in a simple, beginner-friendly way.
What Is Epoxy Resin?
Epoxy resin is a two-part system made up of resin and hardener (also known as Part A and Part B). When mixed together in the correct ratio, a chemical reaction occurs that causes the resin to cure into a hard, durable, plastic-like surface.
Epoxy resin is great because it has:
- A crystal-clear finish
- High durability and strength
- Moisture and chemical resistance
- Versatility for art, crafts, and industrial applications
What Is Epoxy Resin Used For?
Epoxy resin has a wide range of uses across creative and functional industries.
Common Epoxy Resin Uses:
- Resin art and abstract pours
- Jewelry and accessory making
- Wedding flower and keepsake preservation
- River tables and epoxy tabletops
- Countertop and bar-top coatings
- Flooring and protective sealants
Its versatility makes epoxy resin ideal for both DIY projects and professional applications.
Wondering where to start? Take a look at our suggested projects that are perfect for beginners.
How Does Epoxy Resin Cure?
Epoxy resin cures through a chemical process known as polymerisation. Once mixed, the resin gradually hardens over time.
Factors That Affect Epoxy Resin Cure Time:
- Type and brand of resin chosen (there’s fast cure, craft resin and deep pour resins to name a few)
- Resin-to-hardener mixing ratio (2:1 and 1:1 are some of the most popular)
- Room temperature (ideal: 70–75°F / 21–24°C)
- Humidity levels
- Thickness of the resin pour
Most epoxy resin cures within 24 to 72 hours, while full hardness can take up to 7 days.
Is Epoxy Resin Safe to Use?
Yes, epoxy resin is safe when used correctly. Proper safety precautions are essential when working with uncured epoxy resin.
Epoxy Resin Safety Tips:
- ALWAYS FOLLOW YOUR RESIN BRAND’S INSTRUCTIONS – They will vary!
- Wear gloves and eye protection
- Work in a well-ventilated space
- Avoid direct skin contact
- Do not inhale resin fumes
Once fully cured, epoxy resin is non-toxic and safe to handle.
Why Is My Epoxy Resin Sticky or Not Curing?
Sticky, soft, or uncured epoxy resin is one of the most common epoxy resin problems.
Common Reasons Epoxy Resin Won’t Cure:
- Incorrect resin-to-hardener ratio
- Incomplete mixing
- Cold working conditions
- High humidity
Always measure accurately and mix thoroughly, scraping the sides and bottom of your container. Resin settles to the bottom. If you don’t scrape, it won’t be mixed.
How Do You Remove Bubbles From Epoxy Resin?
Air bubbles can appear during mixing or pouring epoxy resin.
How to Remove Bubbles in Epoxy Resin:
- Use a heat gun or torch
- Warm resin bottles before mixing
- Pour slowly and in thin layers
- Tap or vibrate molds to release trapped air
Removing bubbles early ensures a smooth, glass-like finish.
Can Epoxy Resin Be Used to Preserve Flowers?
Yes, epoxy resin is commonly used for flower preservation. However, flowers must be completely dried before being placed in resin.
Fresh flowers contain moisture, which can cause:
- Cloudy resin
- Browning or discoloration
- Mold growth
Silica gel drying is the preferred method for preserving flowers in epoxy resin.
How Long Does Epoxy Resin Last?
When mixed, cured, and cared for properly, epoxy resin can last decades without cracking or breaking down.
How to Make Epoxy Resin Last Longer:
- Use high-quality, UV-resistant epoxy resin
- Avoid prolonged direct sunlight
- Clean with mild soap and water
Are you planning on selling resin? Check out our free downloadable resin care cards.
Does Epoxy Resin Yellow Over Time?
All epoxy resin may yellow slightly over time, especially with UV exposure. High-quality epoxy resins include UV inhibitors to slow this process.
To minimize yellowing:
- Use UV-stabilized epoxy resin
- Keep finished pieces out of direct sunlight
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Can You Fix Mistakes in Epoxy Resin?
In many cases, epoxy resin mistakes can be repaired.
Common Epoxy Resin Fixes:
- Sticky areas: sand and recoat
- Surface imperfections: sand and polish
- Bubbles: sand and apply a new resin layer
- Uneven surfaces: pour a thin flood coat
Epoxy resin is forgiving if corrections are made properly.
What Is the Difference Between Epoxy Resin and UV Resin?
- Epoxy resin cures over time and is best for large projects
- UV resin cures instantly under UV light and is ideal for small items
Both types have specific use cases depending on project size and detail. Read our blog on how to choose the right resin for your project.