Epoxy Resin with Low Exothermic Reaction: What to Know

What is a Low Exothermic Reaction and Why Does it Matter?

When epoxy resin cures, it generates heat as a by-product of the chemical reaction. A low exothermic reaction means the resin remains cooler as it sets, which is especially important for thick pours. If heat builds up too rapidly, it can cause bubbling, cracking, or even warping of your piece and mould. For deeper projects, selecting a resin formulated for low exotherm allows safe, controlled curing and a crystal-clear finish.

Best Practices When Working with Deep Pour Epoxy

• Choose the right resin: Products such as Epoxytable 10-Ten are formulated for deep castings up to 10 cm and specifically designed to avoid overheating.
• Pour in layers if needed: For very large volumes, it may be advisable to pour in consecutive layers, allowing the resin to cool and cure between each to minimise heat build-up.
• Mind the environment: Work in a moderate temperature room, and avoid additional heat sources during curing time.

When Does a Low Exothermic Reaction Matter Most?

Low exothermic reaction resins are most important when pouring thick layers (for example, river tables, large encapsulations, or furniture), and when the project size or weight of resin used is significant. In these cases, using a specially formulated product reduces the risk of overheating and ensures a more reliable final result.