Smooth-On Smooth-Cast 300 - BRIGHT WHITE 2 Pint Liquid Casting Resin Kit - Trial Unit Smooth-On Smooth-Cast 300 Cures Quickly! 10 minute demold time. 3 minute pot life Bright White! Can be sanded, primed and painted. 70D Ultimate shore hardness. 2 Pint unit. 1 Pint part A and 1 pint part B