Resin Curing Time Calculator

This calculator models cure timing as a baseline for each resin speed — standard epoxy, slow or deep-pour, or fast 5-minute — multiplied by two adjustment factors, temperature and pour mass. Temperature is the dominant lever: using 75°F as the reference point, the model doubles or halves cure speed for every 18°F above or below that mark (2 raised to the power of negative temperature-minus-75 over 18), which is why the interface warns that curing slows dramatically below 60°F and accelerates above 85°F — that's not a vague rule of thumb here, it's the actual exponent driving the pot life, demold, and full-cure outputs. Mass has a smaller but real effect: pours over 16 oz apply a 0.85 multiplier and pours over 8 oz apply 0.95, reflecting that a larger mixed volume generates more of its own exothermic heat and effectively cures itself faster than a small test pour at the same room temperature — the tradeoff is a shorter working (pot life) window, not a benefit without cost.

The exothermic risk flag layers mass and resin type together: pours over 32 oz in anything but slow or deep-pour formulations are flagged high risk, since standard and fast epoxies aren't engineered to dissipate the heat from a large single pour and can crack, yellow, or even smoke. Keep in mind this is a modeling estimate, not a substitute for your product's datasheet — always defer to the manufacturer's stated pot life and cure schedule when the two disagree, since formulations vary by brand even within the same category.