Basically like having premixed resin in a tube. Simple product, simple to use, great results. Ding All SUN-CURE is an ultra clear, fibre fill, polyester resin that cures in "minutes" when exposed to the sun (it relies on U.V. Light to harden, so on a bright day it usually takes around 10-15 minutes and around 20-25 on an overcast one). SUN-CURE requires no mixing or adding cloth and cures in any temperature. SUN-CURE produces a tack-free surface that can be sanded in minutes. Please note this is NOT suitable for epoxy boards.