Splitting into equal layers keeps each pour below the heat limit. Thick, enclosed molds hold more heat than wide shallow ones, so stay well under the label maximum for small, deep molds.
Tabletop/coating epoxy: about 1/8–1/4 in. Deep-pour formulas: typically 1–2 in, some up to 4 in. The technical data sheet is the authority.
The curing reaction gives off heat. Too much mass overheats, causing cracks, yellowing, bubbles, smoke or a warped mold.
Usually 12–36 hours depending on the product and room temperature. Many brands suggest pouring when the previous layer is firm but slightly tacky.
Yes. Warm rooms shorten working time and raise heat risk; aim for 70–75°F. See our cure time calculator.
Related: resin calculator · pour layer planner · mix ratio by weight · cure time by temperature · project cost
As an Amazon Associate, ResinMath earns from qualifying purchases.