The SO-Strong® 9-pack gives you the opportunity to experience each colour without spending a lot of money. SO-Strong® liquid urethane colourants can be added to any Smooth-On liquid urethane rubber, urethane plastic or urethane foam (do not use with Smooth-On silicones). They can be used to create a variety of colour effects for a wide range of material applications. For glowing fluorescent colour effects, use Ignite colourants.
SO-Strong® colourants are highly concentrated, offer excellent dispersion and consistent colour. A very small amount will colour a proportionally large amount of liquid urethane material. The more you add in proportion to the volume of liquid urethane, the more dramatic the colour effect. Recommended loading range is .01 per cent to 3 per cent of total system weight. Do not overload the liquid urethane system or cure inhibition / oozing may occur. If this is your first time adding colour to a urethane system, it is recommended that you test the colour effect by adding a few drops to a small amount of material and observe the outcome.