These are a water clear tough resins that will not yellow like some of the polyester types. The down side is that they are extremely moisture sensitive and even using a wooden stick for stirring can introduce enough moisture to cause problems. Mix ratio is one to one by volume.Crystal Clear 202 has a 9 minute pot life
Smooth-On Crystal Clear 202, Trial set – Douglas and Sturgess
Crystal Clear™ Series, Water Clear and UV Resistant
Smooth-On Clear Flex 50, Trial Set – Douglas and Sturgess
Crystal Clear™ Series, Water Clear and UV Resistant
Crystal Clear Series Available in the US and Canada - Reynolds
Urethane Resins – Douglas and Sturgess
SMOOTH-ON Crystal Clear 202 : 0.86kg - Water Clear Urethane
NuClear Epoxy, Quart Set – Douglas and Sturgess
Crystal Clear™ Series, Water Clear and UV Resistant
Smooth-On Crystal Clear™ 202
Crystal Clear Series Available in the US and Canada - Reynolds