Why is butyrate dope considered safer to use than nitrate dope?

Butyrate dope is considered safer to use than nitrate dope primarily because it is much less flammable. Nitrate dope is known for its highly flammable nature, which poses significant safety risks during application and drying processes. The reduced flammability of butyrate dope means that there is a lower risk of fire hazards, making it a safer alternative for use in aircraft fabric coverings and repairs.

While the other factors, such as adhesion properties, drying speed, and environmental impact, can all play roles in material selection, the key distinction that directly addresses safety concerns is the decreased flammability associated with butyrate dope. This characteristic makes it a preferred choice in environments where safety is paramount.