A gelcoat is a smooth, resin-rich layer of polyester that forms the exterior of a reinforced moulded piece. A good gelcoat eliminates the need for further finishing of the moulding piece and reduces maintenance. Gelcoat has three main applications: first, it is used to protect the underlying reinforced layers from weathering, chemical attack, etc. Secondly, the gelcoat serves as surface beautification. Among other things, the gelcoat gives a good shine, makes the reinforcement invisible and covers the ever-present air bubbles in the laminate. Finally, the gelcoat ensures that the moulded part can be coloured evenly. see for more information./ for more information.