FSi Products

FSi Passive Fire Protection Systems: Innovation, Performance, Compliance

FSi specialises in passive fire protection systems that help prevent fire and smoke from travelling through voids, service penetrations, and cavities within a building’s construction. From construction joints and gaps between floors to cable trays, ducting, and pipework, these critical weak points are common vectors for fire to spread – and FSi products are expertly engineered to seal, insulate, and contain these vulnerabilities.

Their extensive product suite fire stopping intumescent sealants that expand when exposed to heat, creating a robust char barrier, alongside fire collars, wraps, and pillows that maintain the fire resistance of walls and floors. FSi’s barrier systems are particularly well-regarded in the industry, with options for vertical and horizontal applications and compatibility with both rigid and flexible wall constructions. Acoustic insulation and air permeability performance often come built-in, delivering added functionality beyond fire protection alone.

Each solution undergoes rigorous third-party testing and certification, offering peace of mind and verifiable compliance. Importantly, FSi continues to innovate in alignment with evolving legislation and practical on-site requirements. Their products not only make specifying easier but reduce the risk of installation error thanks to clear labelling, simple handling, and compatibility with other materials. As part of a larger passive fire strategy, these products form an essential barrier network designed to protect life and property by preventing fire escalation and allowing more time for safe evacuation.

Frequently Asked Questions

What are the main uses of FSi firestop sealants and intumescent products?

FSi sealants and intumescent products are primarily used to maintain fire resistance where services such as cables, pipes, or ducts pass through walls or floors. They help restore the compartmentation integrity of the building, which is critical for containing fire and smoke within a designated area. Common applications include sealing cable trays, conduits, HVAC ductwork, pipework penetrations, and linear joints in walls and floors. Some products are also effective for maintaining acoustic separation and preventing drafts.

How do fire collars and wraps work in passive fire protection?

Fire collars and wraps are designed to protect plastic pipes that pass through fire-rated walls and floors. When exposed to high temperatures, the intumescent material within the collar or wrap expands rapidly, crushing and sealing the softening plastic pipe to prevent the passage of fire and smoke. Fire collars are typically installed around pipes and fixed to the surface, while wraps are flexible solutions that can be fitted into smaller or awkward spaces prior to being sealed in place with mortar or compound.

Do FSi products need to be used with specific substrates?

Many FSi products are designed for use across multiple common building substrates, including concrete, masonry, gypsum, and plasterboard. Some items, such as certain fire sealants, are formulated to maintain strong adhesion and fire performance on porous and non-porous surfaces alike. Always refer to the individual product datasheet and certification documents to confirm suitability with your specific materials and to ensure full compliance with test standards and fire resistance classifications.

What certification standards do FSi fire protection products typically meet?

FSi products are often tested to EN standards such as EN 1366 for fire resistance and EN 13501 for classification of reaction to fire. In addition, they may carry third-party approvals through internationally recognised schemes such as Certifire or ETA (European Technical Assessment). These standards provide assurance that the products have been independently tested under rigorous conditions to demonstrate their performance in real-life scenarios. Be sure to check each product's certification for its intended application and limits of use.

Can FSi products be used in combination for complete compartmentation systems?

Yes, FSi systems are often designed to work in conjunction with one another as part of a broader firestopping and compartmentation approach. For example, a project might require a fire barrier for a cavity wall, sealants for linear gaps, collars for pipe penetrations, and ablative-coated batt for larger service clusters. These systems can be specified together to create a continuous fire-resistant envelope, provided all elements are used within their tested configuration and installation guidelines.