A composition for the manufacture of a gelcoat includes a main component and a curing component. The main component comprises at least one epoxide resin selected from the group consisting of glycidyl ethers of bisphenol A, glycidyl ethers of bisphenol F, trimethylolpropane triglycidyl ethers, and mixtures thereof, and up to 5 wt.-% of at least one of a filler and a pigment based on a total weight of the main component. The curing component comprises at least one cycloaliphatic amine. The main component or the curing component further comprises at least one polytetrahydrofurane polyol.