Low Exothermic Reaction Prevents Overheating on Large Resin Projects

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When working with large resin projects or deep casts, managing heat generation during curing is critical. Resins with low exothermic reactions help prevent overheating and potential failures as the mixture catalyses and hardens.

Why Exothermic Reaction Matters

The term ‘exothermic reaction’ refers to the heat produced as resin cures. In deep or large pours, excessive heat can quickly build up inside the resin mass—potentially leading to yellowing, cracks, or even deformation. By choosing a product with a deliberately low exothermic reaction, this risk is minimised, especially in pours of 5cm or thicker.

Choosing the Right Resin for Large Castings

For large or thick resin pours, such as river tables or block castings, it’s essential to use a resin designed for stable temperature control during curing. Products like “Epoxytable 10-Ten” are formulated to allow safe single pours up to 10cm thick, providing controlled catalysis without rapidly escalating heat. Similarly, if your project is less than 5cm thick, dedicated deep pour resins with low exothermic profiles are recommended for best results.

When This Matters Most

• Creating large tabletops, river tables, or sculptures requiring deep casting
• Projects where total resin weight or the surface area exceeds recommended limits
• Hot summer environments where ambient conditions can further increase reaction temperature

Related products

• “Epoxytable 10-Ten” – Deep Pour Epoxy Resin for Tables, Up to 10cm Casting
• "EpoxyTable 5-Five" – Deep Pour Epoxy Resin for Tables and Large Projects – Up to 5cm
• "Trasparente" – Epoxy Binder for Coloured Pebbles and Grits

Related guides

• At What Temperature Does Resin Catalyse

Using a low exothermic resin is essential for safe, flawless results in large-scale pours. To explore the right options for your next project, see our full guide on resin catalysis temperatures.