Free shipping on orders over £29,85 
Shipping Tracking! 
Google
Facebook← Back to How do you use polyester resin without styrene?
When working with resin, especially in large or thick castings, understanding the importance of a low exothermic reaction can help you choose safer materials and achieve better results. This guide covers how low exothermic reaction affects your resin projects and what to consider when selecting products.
What Is a Low Exothermic Reaction?
An exothermic reaction is the release of heat when a resin cures. If too much heat is generated during casting—especially for thick or voluminous pours—this can cause cracks, yellowing, or unwanted bubbles. Resins with a low exothermic reaction are specifically formulated to release less heat during curing, reducing these risks and allowing thicker castings without compromising on clarity or strength.
Practical Benefits for Deep Pour Projects
Choosing a resin with low exothermic properties is crucial for river tables, large block castings, or artistic projects exceeding a few centimetres in thickness. Products like Epoxytable 10-Ten enable single pours up to 10cm, making it easier to create flawless, bubble-free pieces while avoiding the risk of overheating or surface imperfections.
When This Matters Most
- Resin projects with layers over 2cm thickness
- Large casting volumes (such as river tables or deep moulds)
- Minimising curing issues like warping or yellowing in clear finishes
Related products
Related guides
Understanding low exothermic reaction plays a key role in the success of deep pour and artistic resin applications. If you’re looking for safe, high-quality alternatives to traditional polyester resins with styrene, explore more on our parent hub page for expert product recommendations and technique tips.