How should seams in fabric covering be treated to prevent leakage?

Seams in fabric covering must be treated with a sealant or dope to create a watertight barrier, preventing moisture from penetrating through these critical areas. Sealing the seams is essential because seams are typically vulnerable points in the fabric covering where water can infiltrate, potentially compromising the structural integrity and weight of the aircraft. Applying a sealant or dope not only protects against leakage but also enhances the adhesion of the fabric to the underlying structure, ensuring longevity and durability in various environmental conditions. This is particularly important as aircraft are exposed to fluctuating temperatures and moisture levels during flight and while parked. Thus, treating seams correctly is vital for ensuring the safety and performance of the aircraft.