What is typically used to seal rivet holes from corrosion?

The sealing of rivet holes is critical in preventing corrosion, especially in aircraft structures where exposure to various environmental elements can lead to material degradation. Sealant is specifically designed for this purpose. It is formulated to create a moisture-resistant barrier, effectively preventing water and other corrosive agents from entering the rivet holes and compromising the integrity of the metal.

Sealant not only fills the gaps around rivets to keep moisture out, but it also adheres well to the surrounding surfaces, ensuring that the seal remains intact during the expansion and contraction of materials caused by temperature changes. This is important for maintaining the structural integrity of sheet metal components under various operating conditions.

While paint can provide some level of protection, it does not effectively seal rivet holes in the same way that specialized sealant does. Similarly, polyurethane, though sometimes used in sealants, is not typically described or recognized specifically for sealing rivet holes, and adhesives, while strong, do not offer adequate moisture resistance required for this application. Therefore, sealant is the best choice for effectively sealing rivet holes against corrosion.