As fibreglass is also a plastic from the thermoset family of plastics, it also can be repaired.
Many automotive and truck parts are made of this material and although many people use a fibreglass repair kit for repairs, these are usually of bad quality and rarely work.
We use a combination of preparation and a high quality polyester resin. Some work we have done not only in the automotive industry but in the industrial market is on water tanks and marine craft repairs such as boats and canoes.
An example of a fibreglass repair was on a 15,000 litre water tank that was fractured. A confined space entry was required and ventilation of the tank while works were carried out.