Pre-formed shapes, such as strips, grommets, etc., of rubber or rubber-like composition, used to fill and seal a joint or opening either alone or in conjunction with a supplemental application of a sealant.
A flexible ring or integrated part typically made of rubber that's used to make a seal fluid-tight. Gaskets are positioned between your spoiler and the trunk lid to keep moisture from seeping through the holes drilled when installing the spoiler/wing.