What is the primary function of a seam sealer?

The primary function of a seam sealer is to prevent moisture from entering welded joints. Seam sealers play a crucial role in automotive bodywork by filling gaps and seams that could allow water, dirt, and other contaminants to penetrate into the vehicle's structure. This moisture intrusion can lead to rust and corrosion over time, which can compromise the structural integrity of the vehicle as well as its safety features.

In addition to moisture prevention, seam sealers also help ensure that the paint adheres correctly by providing a smoother surface where joints are present. However, the key function remains protecting those vulnerable areas from environmental factors that may cause damage over time, lending to the longevity and durability of the vehicle’s body.