FyreBox Cast-In: A Smarter Way to Fire-Stop Slab Penetrations
The new FyreBox Cast-In is a purpose-designed passive fire system created for modern construction environments where speed, compliance and trade coordination matter. Installed directly into the formwork before the concrete pour, the Cast-In system provides a clean, pre-planned pathway for mixed services to pass through fire-rated floor slabs without the need for post-installed core drilling.
By shifting the fire-stopping solution into the building phase where it belongs, the FyreBox Cast-In helps eliminate risk, reduce cost and prevent the common defects that occur when penetrations are created after the slab is set.
Why the FyreBox Cast-In Delivers Better Results
Eliminates core drilling
By installing the unit before the concrete is poured, trades avoid the mess, noise, cost and delays associated with cutting holes after the fact. This alone saves significant time during construction.
Supports mixed services in one opening
Electrical, plumbing and HVAC services can pass through a single, neat penetration. This reduces congestion in risers and makes coordination between trades much easier.
High-performance fire protection
The Cast-In features advanced intumescent technology that expands under heat to seal around services, including metal and combustible pipes. Once expanded, the instumescent forms a strong char to maintain the seal for up to 4hr FRL’s.
Precision-built for modern concrete slabs
The system includes off-the-shelf extension sleeves that adapt to different slab thicknesses, removing the need for custom fabrication, speeding up the lead time and installation.
Future-ready design
The BrushSeal inside the unit allows for additional services to be added later, future proofing the buildings that can evolve over time.
Why Builders, Engineers and Installers Trust It
- It provides a tested, repeatable solution
- It supports unlimited service combinations
- It simplifies design, documentation and certification
- It future-proofs the design for changes during the build or after occupancy
- It reduces onsite issues across multiple trades
- It delivers consistent results across every slab penetration
- Removes risk of non-compliance
From the early design phase through to final commissioning, the FyreBox Cast-In supports better planning, cleaner installations and stronger compliance.
