It looks like the cure time on this is closer to Etex than Devcon. From the Art Resin website:
WAITArtResin needs to sit for several hours in a dust-free space while it cures. In about 8 hours it will be tacky but you will be able to pour a second coat if necessary. In about 12 hours it will be dry to the touch, and within 24 hours it will be 95% cured. It will be fully cured within 72 hours.