Correct Catalyst Ratio for Winter Epoxy Mixing

Why You Should Never Increase Catalyst in Winter

Adding more hardener or catalyst to your epoxy might seem like a quick fix for slow curing, but this approach often compromises both the strength and appearance of your finished piece. Manufacturers test their resin systems for the ideal mixing ratio, and deviating from it can lead to soft, sticky, or even brittle results. Stick with the specified ratios—such as 1:1 for One-2-One Epoxy Resin or 2:1 for Icrystal—to maintain predictable performance, even when the mercury drops.

How to Ensure Proper Curing in Cold Temperatures

Rather than adjusting your mix, focus on your working environment. Epoxy resins cure best at room temperature, so aim for a workspace temperature of at least 20°C (68°F). If your area is cold, gently warm your resin bottles in a water bath before mixing and use a space heater to bring your workshop up to temperature. Allow for longer curing times, as reactions naturally slow in cooler conditions.

• Keep resin and hardener containers sealed until use to avoid moisture.
• Pour thinner layers if possible, so heat is retained during cure.
• Check product instructions for winter care tips.

When This Matters Most

Maintaining the correct catalyst ratio is especially crucial for detailed work, deep pours, or larger artistic projects, where improper curing can ruin weeks of effort. Choose quality resins formulated to perform reliably in seasonal temperature fluctuations, such as Icrystal or EpoxyTable 5-Five for deeper pours.