Model & prototype makers: Polyform is reliable for detail and speed but will always result in a beige casting. Decorative objects: For colourful finishes, choose an alternative resin designed for tinting.

Can You Colour Polyform Casting Resin?

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Polyform casting resin is popular for rapid prototyping and small batch projects due to its speed and detail. However, you may wonder if it’s possible to add colour to this beige polyurethane.

Is Polyform Resin Suitable for Colouring?

Polyform is a beige, fast-setting polyurethane casting resin designed for quick, accurate moulding. Unlike many clear epoxies or polyurethanes, Polyform is not suitable for mixing with dyes or pigments. Any attempt to add colourants typically leads to poor mixing, inconsistent curing, or unwanted results such as streaks or impaired performance. If you need coloured castings, you’ll want to consider other resins specifically developed for tinting and decorative use.

Advice for Projects Requiring Coloured Castings

If your project requires vibrant or custom colouring, opt for a clear casting resin where dyes and pigments can be safely and evenly dispersed. Products like fast-setting transparent epoxy resins are well-suited for colour work and decorative effects. Always follow specific mixing instructions to achieve the best finish and durability, and test a small batch first when using any new colouring approach.

When This Matters

Model & prototype makers: Polyform is reliable for detail and speed but will always result in a beige casting.
Decorative objects: For colourful finishes, choose an alternative resin designed for tinting.

Related guides

How Long Before I Can Remove The Formwork

While Polyform offers speed and precision for rapid modelling work, it’s not an option if you wish to colour your resin casts. For more on formwork removal techniques and alternative resins for creative projects, visit our main guide on formwork timing and resin choices.