We probably sell more of these resins than any of the other resins we offer just because they're so easy to use. Mix ratio is 1:1 by volume, and demold time is about seven minutes. Very low viscosity materials, so they'll pick up all of the detail in your mold. InstaCast White cures to a bright white. InstaCast will readily accept glass microballoons as a filler if you want to lighten your castings and save a few bucks in the process. Use White for pastels or if you want a nice white substrate to paint onto. The White is slightly lower viscosity than the Off White.