Service penetration seals are passive fire protection systems designed to maintain the fire resistance of building element or section - wall or floor - where services such as cables, cable trays, pipes or ventilation ducts pass through them. s which Roxtec addresses with its modular cable transit system. Roxtec's seals are used in industrial machines all over the world in the food and beverage, robotics and general machinery industry as well as for buildings and infrastructure to prote nalyzed and understood before a sealing solution. There are many types of sealing systems for cable and pipe penetrations. In this article, "mechanical seals" are compared to "mastic, compounds and wet applied sealing systems". A better alternative to link-type seals, the SLIPSIL Plugs utilize a proprietary self-compression design, and have no bolts, nuts or metallic parts that. Cables, cable bundles, conduits, bundles of conduits, empty pipes, cable trays and cable ladders may also pass through penetration seals in walls and floors and should be taken into consideration during all phases of design and application. The last part of our penetration seal series of articles. They provide waterproof, dustproof, and corrosion-resistant functions at cable connections, ensuring that cable systems can operate safely and stably in various complex environments. These systems help prevent water ingress, moisture intrusion, and air leakage.