Such a seal is expensive, but it pays off in terms of durability and tightness. Any seal is required in care to ensure its durability. To care for the seal, special mastics are used that soften them and extend the service life. Basically, seals are installed on interior doors at the factory. In addition to sound insulation and tightness, a good seal provides reliable dust protection. The seals protect against loud strokes that may appear when slamming the door.
