Introduction
Eco resin has become increasingly popular with makers who love its matte, stone-like finish and fast curing time. However, if you’re used to working with epoxy resin, eco resin can behave quite differently.
Many beginners run into issues such as bubbles, cracking or pieces that break easily, often because the material is mixed or handled incorrectly.
In this guide, we’ll explore the most common eco resin mistakes and how to avoid them.
Disclosure: This article may contain affiliate links or brand partnerships. I only recommend products I personally use and trust.
1. Incorrect Mixing Ratio
One of the most common mistakes with eco resin is using the wrong powder-to-water ratio.
Unlike epoxy resin, eco resin relies on the correct amount of water to achieve the right consistency and strength.
Signs of incorrect mixing
• weak or crumbly pieces
• uneven texture
• difficulty demoulding
How to avoid it
Always follow the manufacturer’s recommended ratio and measure carefully using accurate scales or measuring tools.
Mix slowly until the texture becomes smooth and lump-free.
2. Overmixing the Resin
Mixing eco resin too aggressively can introduce air bubbles into the mixture.
Because eco resin cures quickly, these bubbles can become trapped in the final piece.
Prevention tips
• mix slowly and steadily
• tap the mould gently after pouring
• lightly tap the container to release trapped air
These small steps can help achieve a smoother finish.
3. Demoulding Too Early
Eco resin cures much faster than epoxy resin, but that doesn’t mean it’s ready to demould immediately.
Removing pieces too early can cause:
• cracks
• fragile edges
• warping
Best practice
Allow the piece to cure fully before demoulding and give it additional time to strengthen before sanding or sealing.
4. Not Sealing Eco Resin
Eco resin is naturally porous, which means it can absorb water or stains if left untreated.
This is especially important for pieces such as:
• coasters
• trays
• plant pots
Solution
Apply a suitable sealant to protect the surface and improve durability.
5. Using the Wrong Pigments
Not all pigments behave the same way in eco resin.
Because eco resin is water-based, some colourants designed for epoxy resin may not perform well.
Best pigments for eco resin
• mica powders
• mineral pigments
• powder pigments
These mix well with eco resin and create soft, natural colour effects.
6. Working Too Slowly
Eco resin typically has a short working time, meaning it begins to thicken fairly quickly after mixing.
If you spend too long adding pigments or adjusting your moulds, the resin may start to set before pouring.
Helpful tip
Prepare everything in advance:
• moulds
• pigments
• tools
This allows you to pour the mixture while it is still fluid.
Final Thoughts
Eco resin can produce beautiful, stone-like pieces, but it requires a slightly different approach compared to epoxy resin.
By understanding how eco resin behaves and avoiding these common mistakes, you can achieve smoother casts and more durable pieces.
With practice, eco resin becomes a rewarding material to work with for decorative homeware and craft projects.
Read Next
If you're learning to work with resin, these guides may also help:
• What Is Eco Resin? Pros, Cons and How It Works
• Eco Resin vs Epoxy Resin: What’s the Difference?
Until the next pour! 💖
Krystal x
Founder | Krystals Resin Kitchen
0 comments