Overheating Can Cause Resin to Yellow or Develop Ripples

Why Overheating Epoxy Resin Is a Problem

Excessive heat can alter the chemical properties of epoxy resin during curing. If the temperature rises too high—either from environmental heat or by using tools like a heat gun too aggressively—the resin may discolour, turning yellow over time. Similarly, overheating can disturb the surface, leading to ripples or waves instead of a smooth finish.

Tips for Preventing Yellowing and Ripples

• Always use heat carefully. When working with tools like the Gas Heat Gun for Epoxy Resin, apply the heat in short bursts and keep the tool moving to avoid concentrating heat in one spot.
• If you need to raise room temperature, a fan heater such as the Rhino 2kW Fan Heater with adjustable thermostat can help keep the workspace warm and consistent.
• Mix your resin thoroughly and ensure the workspace is at a recommended, stable temperature before pouring.

When This Matters Most

Overheating becomes especially relevant for large pours, thick resin layers, or when using strong heating tools to remove bubbles. These scenarios increase the risk of localised heat build-up, so extra caution is needed to maintain an even, moderate temperature throughout the curing process.