What Is a Low Exothermic Reaction in Epoxy Resin?

How Low Exothermic Reaction Influences Curing

Epoxy resins with a low exothermic profile are engineered to release less heat during the curing process. This is crucial for deep pour applications—such as making tables or thick, clear castings—because it helps prevent unwanted issues like cracking, yellowing, and overheating. Products like EpoxyTable 5-Five are designed specifically for pours up to 5cm, allowing the resin to set slowly for a flawless finish without excessive heat build-up.

Benefits for Deep Pour and Cold Condition Projects

In practical terms, a resin with low exothermic reaction is more forgiving for beginners and professionals alike. It offers a longer working time, reducing the pressure to rush the mixing or pouring, and helps avoid bubbles that can form if the curing is too rapid. If working in a colder environment, the slower heat build-up ensures the resin cures evenly. However, manufacturers still recommend avoiding pouring when conditions are too cold or if the project requires much thicker layers than recommended.

When This Matters Most

• You are creating tabletops, river tables, or artworks requiring thick, clear casts.
• The workspace temperature is lower than ideal and you want to reduce risks during curing.
• You wish to minimise stress on the resin and substrate, preventing warping or heat-related defects.