What Is Epoxy Resin? (Beginner’s Guide)
Epoxy resin is a two-part system made up of Part A (resin) and Part B (hardener). When mixed together in the correct ratio, these components create a chemical reaction that turns liquid resin into a solid, durable material.
This process—called resin curing—is what gives epoxy its strength, clarity, and high-gloss finish, making it popular for resin art, jewelry, coatings, and DIY projects.
How Does Epoxy Resin Work?
Epoxy resin works through a process called cross-linking.
Part A contains epoxide molecules
Part B contains hardening agents
When combined, these molecules bond together to form a strong, rigid structure. This transformation is what makes epoxy resin ideal for art, crafts, and protective coatings.
Epoxy Resin Mixing Ratios Explained
Getting the epoxy resin ratio right is critical for proper curing.
Common ratios include:
1:1 epoxy resin ratio (equal parts)
2:1 resin to hardener
100:47 by weight (used in some professional resins)
👉 Using the wrong ratio can result in:
Sticky or tacky resin
Soft or flexible finishes
Resin that never fully cures
Always follow your specific brand’s instructions.
How to Measure Epoxy Resin (Weight vs Volume)
Accurate measuring is key to successful resin projects.
Measuring by Weight (Best Method)
Use a digital scale
Ideal for precise ratios like 100:47
Most accurate for professional results
Measuring by Volume
Use graduated measuring cups
Works well for simple ratios like 1:1
Pro tip: Measuring epoxy resin by weight gives more consistent results and reduces curing problems.
How to Mix Epoxy Resin Properly
Proper mixing ensures a smooth, fully cured finish.
Mix for 2–3 minutes
Scrape the sides and bottom of your container
Stir slowly to avoid bubbles
Ensure the mixture is completely clear and streak-free
Poor mixing is one of the most common causes of resin curing problems.