Why Mixing Ratios Must Be Followed Precisely for Epoxy Resin

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When working with epoxy resins, using the exact mixing ratio of part A (resin) to part B (hardener) is essential for ensuring your project cures correctly, performs as expected, and achieves a professional finish.

Why Does the Mixing Ratio Matter?

Epoxy resins are formulated to react at a precise ratio between resin and hardener. This ratio is carefully set by the manufacturer based on their chemical properties. Too much or too little of either component can prevent the resin from curing, cause a sticky or brittle result, or damage the clarity of your finish. Reliable performance, clarity, and durability rely on following the specified ratio for each product—such as a 3:2 or 2:1 mix, as marked on your resin packaging.

Practical Tips for Accurate Mixing

Always check your product label for the recommended ratio (by weight or volume).
Use a digital scale for the most accurate measurements—some resins, like “Art Pro”, specify a 3:2 ratio by weight.
Measure both components carefully before mixing, and blend thoroughly until the mix is fully uniform.
If you’re switching between products, don’t assume all resins use the same ratio—each formulation is different.

When This Matters Most

Critical projects—such as art pieces, table pours, jewellery, or surface coatings—require precise mixing for strength and clarity. Products like EpoxyTable 5-Five and “Trasparente” each require their unique ratios to ensure bubble-free, UV-stable, and fully cured results.

Related guides

Can I Change The A B Mixing Ratio

Careful attention to mixing ratios is the key to a flawless resin finish. For more tips and to explore suitable epoxy resins, return to our main guide on A+B mixing ratios for epoxy projects.