Curing Time: UV lamp (36 watts, 2-4 Minutes). Sunlight (Sunny Day 5-10 minutes). Sunlight Cloudy (Cloudy 20-40 Minutes). Instructions: Hardening occurs under Sunlight. Please work indoors. Hardening occurs when exposed to Ultraviolet light for a long time. Please wear gloves and glasses when working. Attention: when it's it will heat up the temperature will become high. When working, please be careful not to let the skin, clothes, furniture, etc. Stick to the UV resin. Made In China.