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Gelcoats and topcoats

Gelcoats and topcoats for manufacturing and finishing composite parts, with products for swimming pools, boats and mould making. The choice depends on whether you are working on a mould or a laminate, the resin system and the finished part's intended use.

Topcoats for composites
Topcoats for composites
Polyester gelcoats
Polyester gelcoats
Vinyl ester gelcoats
Vinyl ester gelcoats
Epoxy gelcoats
Epoxy gelcoats
What to consider when choosing

How to choose between gelcoat and topcoat

When manufacturing a part in a mould, the gelcoat forms its outer surface. If you need a finish over an existing laminate, a topcoat is usually the choice. Distinguishing these two jobs helps you choose by more than colour or trade name: a part's finish and a mould's surface do not serve the same purpose.

Swimming pool finishing and repairs

For composite swimming pools, the catalogue includes ISO-NPG topcoats whose descriptions specify this application. In Topcoats for composites, you can find these products and compare them with the existing finish. Not every product in the family is suitable for swimming pools, and a colour called pool blue does not in itself establish suitability. If the work also involves the laminate, distinguish the materials needed for the repair from the product intended for the surface finish.

Boats and glass fibre parts

In marine work, you may be looking to manufacture a new part, renew its finish or repair a damaged area. The surface you will be working on and the exposure of that area are important details when selecting a product. For work that goes beyond the finish, also see Materials for boat repair and maintenance.

Gelcoats for mould making

If you are building a mould, look for a formulation specifically intended for moulds, rather than simply a gelcoat in the desired colour. The Polyester gelcoats, Vinyl ester gelcoats and Epoxy gelcoats families let you choose by resin type. Then distinguish products for parts from those intended for moulds and check compatibility with your chosen system.

Brush or spray application and colour selection

The application method is another buying criterion: choose a product formulated for the equipment you intend to use. If you need a particular colour, see GelTint polyester gelcoats in RAL colours and Polyester topcoats in RAL colours. Before buying, check the product description and technical data sheet for the substrate, intended use and required components; the safety data sheet covers handling precautions.

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