Polyurethanes can be coloured with special polyurethane pigments, which can be either liquid or powder.

When colouring flexible resins, we recommend you use powdered pigments as they affect the mechanical properties less.

Due to variations in the base colour of the polyurethane exact colour matches may be difficult to achieve.

Typical concentrations of pigment are 1% - 3% by weight

We do not recommend concentration of the pigment to be more than 3% as this can compromise the mechanical properties of the material.

Always perform a test specimen.