External Wall Penetrations – watertight & fire rated

External Wall Penetrations – watertight & fire rated

External wall penetrations are essential for bringing services into buildings. If left unsealed, they become weak points where water, gas or fire can spread. This not only threatens safety but can also undermine compliance and damage critical assets.

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CSD provides sealing solutions specifically designed for external wall service entries. Our systems deliver certified watertight and fire-rated protection, ensuring long-term resilience in challenging above- and below-ground environments.

Your Challenges

Exposure to rainfall, groundwater and external pressure
Potential for fire spread through wall penetrations
Complex service layouts with varying cable and pipe diameters
Requirement for seals that remain effective over the building’s lifespan

Our Solutions

NOFIRNO Flexible Pipe Penetration Seal

NOFIRNO® Rapid Duct Seal

A fast-install, high-performance sealing system designed for speed-critical or restricted-access environments, offering reliable, water and gastight protection with full re-entry capability.

SLIPSIL Plugs

SLIPSIL® Sealing Plugs

Maintenance-free, tool-less installation for single or trefoil cable and pipe penetrations, providing a gas and watertight seal that remains fully re-enterable without the need for mechanical fixings.

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SLIPSIL® Plugs

Maintenance-free, tool-less installation for single or trefoil cable and pipe penetrations, providing a gas and watertight seal that remains fully re-enterable without the need for mechanical fixings.

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NOFIRNO® Flexible Pipe Penetration Seals

A versatile, certified system for metallic, GRP and plastic-coated pipes, providing up to four hours’ fire resistance alongside watertight and gastight performance. Flexible and re-enterable, it’s trusted worldwide for its long-term durability and ease of installation.

OFIRNO Flexible Pipe Penetration Seal

NOFIRNO® Plastic Pipe Penetration System

Specifically designed for the unique challenges of plastic pipes, this system provides certified fire and smoke protection while maintaining sealing performance as pipes soften or melt under heat. Ideal for civil, industrial and commercial projects where plastic services are widely used.

FYLLOFOAM Fire Protection

FYLLOFOAM® Fire Protection

A lightweight, flexible foam-based sealing solution, FYLLOFOAM® provides fire-rated protection for grouped cables while simplifying installation in irregular or hard-to-access spaces.

ACTIFOAM

ACTIFOAM® Fire Protection

Engineered for environments requiring adaptive sealing performance, ACTIFOAM® expands under heat to maintain fire integrity around grouped cables, offering an innovative solution for challenging layouts.

GlandMod Multi-Gland System

GlandMod® Multi-Gland System

A modular gland system that allows multiple cables to pass through a single entry point with individual sealing for each. Designed to reduce installation time while maintaining fire, water and gas protection.

Fireboard

FYLLOFYS® Fire Board

A waterproof, lightweight fireboard system providing up to two hours of certified fire resistance. FYLLOFYS® combines proven fire stopping performance with exceptional water resistance, making it ideal for damp environments, transport hubs, and marine applications.

Conduit

Frames and Conduit Systems

Robust steel frames and conduit systems designed to house CSD sealing solutions. Available in multiple configurations to suit round, square or rectangular penetrations, with proven fire and watertight performance.

“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