What is a significant concern regarding sealants used in repairs?

The significant concern regarding sealants used in repairs centers around toxicity and flammability. Many sealants contain chemicals that can emit harmful vapors or present a fire hazard when exposed to certain conditions. When working with sealants, especially in enclosed spaces such as aircraft, it is crucial to be aware of the potential for toxic exposure, which can affect both safety and health. Furthermore, the flammable nature of some sealants represents a serious risk during application or if they are subjected to heat.

Understanding these hazards is essential for anyone involved in repairs, as safety protocols must be adhered to when handling materials that may release toxic fumes or ignite. This awareness helps maintain a safe working environment and ensures compliance with safety regulations during aircraft maintenance and repair processes.