The SLIPSIL® Sealing Plug system is the quick, reliable choice for permanently sealing unused or spare ducts, sleeves, and conduits. Designed for straightforward installation without special tools or frames, SLIPSIL® Sealing Plugs provide certified protection against fire, water and gas ingress, ensuring every opening in your infrastructure is safe and compliant.
Seal smarter with SLIPSIL®
Premium protection in every environment. Seal out risk. Seal in confidence. From power plants and substations to telecoms and transport hubs, SLIPSIL® Sealing Plugs are trusted worldwide for their ease of use and long-term durability. Their flexible rubber construction ensures a tight, reliable seal that adjusts to variations in duct size, while their maintenance-free design makes them a cost-effective solution for decades to come.
SLIPSIL® Sealing Plugs
Key Benefits
- Up to 2 hours fire resistance – tested and certified.
- Watertight and gastight – pressure-tested for long-term reliability.
- Fast installation – no frames or special tools required.
- Versatile sizing – wide range of plug diameters for any duct size.
- Maintenance-free – 50+ year service life, age-tested performance.
Designed For
- Power generation and utility networks
- Industrial and civil infrastructure
- Telecoms and fibre optic rollouts
- Transportation hubs
- Commercial construction
Useful Information
Find everything you need to specify, install and maintain CSD systems. Access the latest datasheets, certifications and installation guides, all in one place.
The installation advantage
With no frame or mastic required, SLIPSIL Sealing Plugs can be installed in minutes. Their tapered, elastic design allows for simple hand-fitting into ducts, instantly delivering a secure, certified seal. This makes them the ideal solution for fast-paced projects where reliability and efficiency cannot be compromised.
“CSD’s team are very focused in their approach to provide a high-quality product and service. We are looking forward to working with them in the future.”
Senior Electrical Design Engineer
Thames Water