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When working with epoxy resin in thicker layers or larger volumes, a low exothermic reaction is crucial for both quality and safety. This guide explains what it means and why you might want a formulation designed specifically for low heat release during curing.
What Does Low Exothermic Reaction Mean?
Epoxy resin hardens through a chemical reaction that releases heat—known as the exothermic reaction. In standard or fast-curing resins, this can generate significant warmth, especially in deep pours or large castings, potentially leading to cracking or yellowing. A low exothermic reaction means the resin is engineered to release heat more gradually, reducing the risk of overheating.
Why Choose Low Exothermic Resin for Deep Pours?
Deep pour epoxy formulations such as the Epoxytable 10-Ten and EpoxyTable 5-Five are ideal for thick tabletops or large-scale casting. Their controlled heat output allows for safe casting up to 10cm or 5cm in a single layer, with minimal risk of bubbles, warping, or discolouration. This gentle curing process also means extended working time—perfect for complex artistry where you need to position items or mix pigments without rushing.
Practical Tips for Working with Low Exothermic Resin
- Layer Thickness: Always choose a resin suited to the thickness of your pour—up to 10cm for Epoxytable 10-Ten and 5cm for EpoxyTable 5-Five.
- Temperature Control: Work in a room-temperature environment and avoid external heat sources. Let the resin cure undisturbed for best results.
- Mixing Ratio: Use the recommended mixing ratios to ensure the resin cures fully and evenly.
When This Matters
Opting for a low exothermic resin is vital when casting deep layers, creating thick tabletops, or any scenario where conventional resins might overheat and compromise your project’s finish. It’s also safer to use for larger volumes, as the gradual temperature build-up protects both your work and work environment.
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For big creative projects and professional table casting, understanding resin exothermic behaviour is key. Explore more on the science behind epoxy drying in our main guide: how does epoxy resin dry?