Why Changing the A + B Mixing Ratio Compromises Epoxy Resin Results

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Changing the A + B Mixing Ratio Can Compromise Results

When working with epoxy resin, altering the specified mixing ratio of component A (resin) to component B (hardener) can lead to more problems than you might expect. The correct ratio is key to a strong, clear, and reliable finish, and even minor adjustments can disrupt performance.

The Importance of the Correct Mixing Ratio

Epoxy resins are carefully formulated with a precise ratio of resin to hardener—such as 3:2, 100:55, or 2:1—depending on the product. This ratio governs the chemical reaction that transforms your liquid mixture into a hard, durable material. Changing it, even slightly, can stop the resin from curing properly, resulting in a sticky, weakened, or cloudy finish. Products like “Art Pro” Clear Epoxy Resin are designed for reliable results using their recommended 3:2 ratio and should be mixed precisely as indicated.

Practical Guidance: Mixing for Best Results

Always measure each part by weight (or volume, if specified), using clean, accurate tools. Pour both components into a mixing cup, blending thoroughly to ensure a complete reaction. Follow your chosen resin’s instructions closely—don’t be tempted to add more hardener to speed things up or reduce it for longer work time. For thicker projects, such as tables or large decorative pieces, select an epoxy resin intended for your required pour depth and its associated ratio, like EpoxyTable 5-Five for deep pours or Trasparente for detailed items.

When This Matters Most

Large projects: Incorrect ratios in larger pours or surface coatings can magnify imperfections and lead to expensive mistakes.
High-gloss finishes: Deviating from the recommended ratio often results in a cloudy or uneven finish instead of a crystal-clear effect.
Functional or structural use: Incorrectly mixed resin may remain tacky, weaken over time, or fail under stress, especially for creative or load-bearing work.

Related guides

Can I Change The A B Mixing Ratio

Carefully following your epoxy resin’s mixing instructions is the simplest way to achieve the quality and reliability you expect. For further advice and the best products suited to your creative needs, visit our main guide on mixing ratios.