How Low Exothermic Reaction Epoxy Resins Prevent Overheating During Curing

Understanding Exothermic Reaction in Epoxy Resin

When epoxy resin cures, it undergoes a chemical process that emits heat—this is an exothermic reaction. With deep or large volume pours, excessive heat can cause cracking, yellowing, or incomplete curing. Selecting a resin designed for a low exothermic reaction greatly minimises these risks and helps ensure an even cure throughout your casting.

Practical Tips for Safe Deep Pour Casting

• Choose a suitable resin: For thick casts, opt for formulas like Epoxytable 10-Ten or “EpoxyTable 5-Five”, both designed for controlled, deep pouring.
• Layer in stages: For pours that exceed the recommended single-layer thickness (e.g., 10 cm for Epoxytable 10-Ten, or 5 cm for EpoxyTable 5-Five), pour in multiple stages to prevent overheating.
• Monitor temperature: Always check ambient and resin temperatures, working in a well-ventilated space and allowing layers to cool before re-pouring.

When This Matters Most

Low exothermic reaction becomes especially important when your resin project involves large surface areas, thick pours, or complex shapes that slow heat dissipation. This makes it key for crafting sizable tabletops, embedded designs, and river tables where a single large pour is necessary.