Polyester opaque colour paste, usually added to the initial (gelcoat) or final (flowcoat) resin, can be added at a rate of up to 10% by weight.

Transparent pigments are added up to approx 2%, giving a very effective see through colour, best effects are with the polyester casting resin however these can be used with clear epoxies but some colours do vary slightly.


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Opaque colour pigment paste.
Available from £3.60
Transparent pigments, specifically designed for polyester resins, however they will work with epoxy systems.
Available from £2.04

Epoxy specific colour pigment.

Available from £3.84
Polyurethane pigment
Available from £4.98