Hi! We're so glad you've tried our Resin Craft by Me resin! We always experience different curing times due to humidity, thickness of resin poured, type of mold used, and amount of inclusions and pigments used. If your piece is still tacky, try putting it in direct sunlight for a few hours and wait 24 hours. Your resin should be dry and hard. Let us know if we can contact you directly to problem solve. We want you to be successful with our resin crafts!