 How thick can I pour Art Resin? Art Resin was designed as a surface application as opposed to a casting resin. This means that it self-levels at about an eighth of an inch, so long as you pour in 1 eighth inch layers, you can go as thick as you like. Keep in mind that the cure time is based on that 1 eighth inch layer, so if you do pour thicker, it may take longer to cure. The reason we recommend this thickness is two-fold. First, it allows the bubbles to escape properly, and secondly, it avoids any excessive overheating of the resin. So for best results, always pour in that 1 eighth inch layer, and you're good to go.