This dark-colored sealant, typically made of rubber, foam, silicone, or felt, creates a barrier between a door and its frame. It comes in various forms, including adhesive-backed strips, V-channels, and felt sweeps, designed to fit different door types and gaps. An example would be a thin strip of flexible rubber lining the edge of a residential entryway to prevent drafts.
Effective sealing significantly improves energy efficiency by reducing air leakage, which helps lower heating and cooling costs. It also minimizes noise infiltration, enhances indoor comfort, and protects against dust, insects, and moisture. While specific origins are difficult to pinpoint, the fundamental concept of sealing gaps around doors and windows to improve living conditions dates back centuries, with materials evolving from simple cloths and natural fibers to the sophisticated synthetics available today.
