Smooth-On's Smooth-Cast 325 are urethane resins that were developed specifically for adding color pigments and fillers to achieve true color representation or filler effect.
The ColorMatch® Plastic Series is formulated as “color neutral”. Small amounts of pigment will yield accurate, vivid colors from cured castings using So-Strong™ tints UVO™ pigments or Ignite™ color pigments.
The ColorMatch™ Series offers the convenience of a 1A: 1B mix ratio by volume and has a very low viscosity.
Note: Large mass castings will get very hot and shrink more, depending on mold configuration.
Mix Ratio: 1A:1BColor: Clear AmberPot Life: 2.5 minutesCure Time: 10 minutesShore Hardness: 72D
Safety Data
Applying A Release Agent - A release agent is necessary to facilitate demolding when casting into or over most surfaces. Use a release agent made specifically for mold making (Universal® Mold Release or Mann’s Ease Release™ 200 available from Smooth-On or your Smooth-On distributor). A liberal coat of release agent should be applied onto all surfaces that will contact the plastic.
NOTE: When adding SO-Strong™ RED tint to Smooth-Cast™ 326 or 327, the color will darken and change. For a better match when using SO-Strong™ RED, use Smooth-Cast™ 325 as your casting resin. This is only an issue with SO-Strong™ RED, all other SO-Strong™ colors will behave normally.