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If you’re planning a deep resin casting—like a river table or chunky decorative artwork—choosing a formula that allows safe pours up to 5cm is essential. The right resin minimises heat build-up (exotherm), helping achieve flawless results in a single layer.
Why Exothermic Reaction Matters in Deep Pours
When epoxy cures, it produces heat—a process known as ‘exothermic reaction.’ Standard resins poured too thick can quickly overheat, risking cracks, bubbles, or yellowing. Low-exotherm deep pour resins are specially designed to control this heat, making 5cm thick casts possible without compromising clarity or structural integrity.
Practical Steps for Safe 5cm Resin Casting
- Choose a deep pour resin: Products like EpoxyTable 5-Five are formulated for thick castings—up to 5cm—thanks to their low heat output and long working time.
- Mix accurately: Precision in weighing and mixing resin and hardener ensures a complete cure and minimises trapped bubbles.
- Pour in suitable conditions: Work in a stable room temperature and avoid additional heat sources during curing. Pour slowly into formwork to allow air to escape naturally.
- Allow full curing: Deep pours require more time to harden but result in a strong, crystal-clear finish if left undisturbed.
When This Matters Most
Using a low exothermic resin is crucial for large tables, thick artwork, and projects involving embedded items. Attempting a 5cm pour with standard epoxy risks overheating, loss of transparency, and surface flaws. Always check product specifications before beginning deep projects.
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Understanding how to cast up to 5cm in one pour unlocks new creative potential with resin. Always follow product guidelines, and for step-by-step advice, see our full guide on how to apply resin.