A typical resin has medium viscosity while the gelcoat is a material of higher viscosity. A gelcoat is normally 3 times more thixotropic than a typical resin. This ensures that a layer of recommended thickness can be applied as a single / double coat without any drainage on the given surfaces.
Gelcoat is the outermost layer of the laminate and it applies to the laminate in small quantity (a film size of 500 – 600 µ) this thickness is preferably build up in two coats this layer is used as a protective as well as aesthetic layer to the resin laminate. It also gives the very good cosmetic look to the laminate.