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Tech Specs
Smooth-Cast™ plastics offer tremendous versatility and economy. They are easy to use and available as either rigid or semi-rigids. You can add different colors and/or fillers for an infinite variety of mind-blowing effects. Perfect for casting detailed models, prototypes, props and cast effect pieces.
Smooth-Cast™ 300, 300Q, 305, and 310 are ultra-low viscosity casting resins that offer the convenience of a 1:1 mix ratio by volume and yield castings that are bright white, tough, durable, machinable, paintable, and virtually bubble free.
Additional Information
SDS
https://www.smooth-on.com/msds/files/SC_300_300Q_320_380_45D_60D_61D_65D_66D_ONYX.pdf
Specs
https://www.smooth-on.com/tb/files/Smooth-Cast_300q,_300,_305___310.pdf