https://www.compositesworld.com/articles/in-situ-composite-r...

The vast majority of repairs to composite structures carried out by aircraft line maintenance technicians are low-temperature (room temperature to 150°F/66°C) wet layups, which are typically temporary or time-limited repairs. These technicians, who are typically generalists with minimal training in composites repair, must diagnose and correct both minor and major aircraft damage at the gate. A room-temperature wet layup repair requires no disassembly and no external heat sources, such as hot-bonding equipment, which would require more extensive training to properly operate and can be hazardous when used on a fueled aircraft.