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Fiberglass tutorials

Polyester and gelcoat, step by step.

What would you like to do?

Start with mixing

Graduated resin cup, mixing stick and catalyst container on a workbench.

Essential guide · 7 stepsPrepare and mix resinUnderstand your polyester system, organize the work and prepare a manageable batch before laminating.

Polyester repair

Consolidation roller on resin-wetted fiber inside a curved mold.

7 stepsIn a moldBuild the laminate on a mold that is removed when the part is finished.

A gloved hand brushes resin onto fiberglass reinforcement in a repair.

7 stepsOn a surfaceRepair an existing fiberglass substrate prepared for bonding.

Gelcoat application

Illustrative comparison: red pigment produces pink in white gelcoat and a stronger red in neutral gelcoat. Actual shades vary.

9 stepsHow to color polyester gelcoatChoose the right base, measure compatible pigment and check a cured sample before coloring your project.

White gelcoat being sprayed onto the inside of a blue mold.

7 stepsIn a moldApply gelcoat first, then add the fiberglass backing.

Gelcoat being sprayed onto a repaired fiberglass surface.

7 stepsOn a surfaceApply gelcoat as a finish over an already repaired part.