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How much So-Strong pigment can I add to my urethane material?

SO-StrongTM liquid urethane colorants can be added to any Smooth-On liquid urethane rubber, urethane plastic for urethane foam (do not use with Smooth-On silicones). They can be used to create a variety of color effects
for a wide range of material applications. For glowing fl uorescent color effects, use Ignite colorants.
SO-StrongTM colorants are highly concentrated, offer excellent dispersion and consistent color. A very small amount will color a proportionally large amount of liquid urethane material. The more you add in proportion to the volume of liquid urethane, the more dramatic the color effect. Recommended loading range is .01% to 3% of total system weight. Do not overload the liquid urethane system or cure inhibition / oozing may occur.

If this is your fi rst time adding color to a urethane system, it is recommended that you test the color effect by adding a few drops to a small amount of material and observe the outcome. Color Tints: Black, Brown, Yellow, Purple, Green, Orange, Red and Blue.
Color Pigments: White and Fleshtone



The FAQ list is offered as a guideline and offers possible solutions to problems encountered during mold making and casting. No warranty is implied and it is up to the end user to determine suitability for any specific application. Always refer to the provided Technical Bulletins (TB) & Material Safety Data Sheets (MSDS) before using any material. A small scale test is suggested to determine suitability of any recommendation before trying on a larger scale for any application.



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