Epoxy Resin Mixing Ratios Explained: 2:1 vs 3:1 – Which Should You Use?
If you're new to epoxy resin crafting, one of the first questions you'll face is: what mixing ratio do I need? The ratio printed on your resin kit isn't just a suggestion — it's chemistry. Getting it wrong leads to sticky, soft, or cloudy results. This guide breaks down the difference between 2:1 and 3:1 epoxy resin so you can choose the right product for your project every time.
What Does the Mixing Ratio Mean?
Epoxy resin is a two-part system: Part A (resin) and Part B (hardener). The ratio tells you how much of each part to combine by volume or weight. For example:
- 2:1 ratio = 2 parts resin to 1 part hardener
- 3:1 ratio = 3 parts resin to 1 part hardener
These ratios are determined by the chemical formulation of the resin. You cannot substitute one for the other — always use the ratio specified for your product.
Blissta Epoxy Resin 3:1 – Best For Thick Pours & Casting
The Blissta Epoxy Resin (3:1) is formulated for projects that need depth and volume. Mix 3 parts resin with 1 part hardener.
Best uses:
- River tables and wood fills
- Casting moulds (coasters, paperweights, jewellery)
- Deep pours up to 50mm in a single layer
- Encapsulating objects (flowers, photos, coins)
Key properties: Longer working time (~25 minutes), self-levelling, low viscosity for bubble release.
Blissta Epoxy Resin 2:1 – Best For Coatings & Surface Work
The Blissta Epoxy Resin (2:1) is ideal for thin, glossy coatings. Mix 2 parts resin with 1 part hardener.
Best uses:
- Tabletop and countertop coatings
- Sealing artwork and paintings
- Thin flood coats over surfaces
- Bar tops and serving boards
Key properties: Higher hardener content gives a harder, more scratch-resistant finish. Shorter working time (~15 minutes).
How to Measure Accurately
Accurate measurement is the single most important step in resin work. Even a small error can prevent proper curing.
- Use graduated mixing cups — measure by volume, not by eye.
- Measure Part A first, then add Part B.
- Scrape the sides of your measuring cup into the mixing vessel.
- Mix slowly for 1–2 minutes, scraping the sides and bottom of the cup.
- Pour into a second clean cup and mix for another 1–2 minutes to ensure full incorporation.
Common Mixing Mistakes to Avoid
- ❌ Eyeballing the ratio — always measure precisely
- ❌ Under-mixing — sticky spots are caused by unmixed hardener
- ❌ Mixing too fast — introduces air bubbles
- ❌ Using cold resin — warm both parts to room temperature (25–30°C) before mixing
Which Ratio Is Right for Your Project?
A simple rule of thumb: if your project is deep or 3D, use 3:1. If your project is flat or a surface coating, use 2:1. When in doubt, check the product page for recommended applications.
Ready to start? Browse our full Epoxy Resin collection to find the right kit for your next project.
