Fire-rated sealants are a key part of any passive fire strategy. They’re specifically designed to seal joints, gaps and service penetrations in fire-rated walls, floors and ceilings, preventing the passage of flames, smoke and hot gases.
Why They’re Important
Even a small opening in a fire barrier can allow fire or smoke to spread. This is especially true in high-service areas such as data centres, plant rooms and riser shafts. Fire-rated sealants provide a flexible and cost-effective way to restore compartmentation.
Types of Sealants
- Intumescent – expands in heat; used around plastic pipes and cables
- Ablative – insulates without expanding; suited to metal services
- Silicone-based – flexible and weather-resistant; common in façade joints
Correct Application
All fire-rated sealants must be:
- Tested to AS 1530.4, and
- Installed in accordance with AS 4072.1
Selection depends on service type, substrate, FRL, and gap size (including movement).
Ceasefire Best Practice
Ceasefire only uses products that have been tested for the exact site conditions. Our technicians install sealants with the correct depth, bead size and backing material, and record every application in the Passive Fire Register.
Common Errors to Avoid
- Using general-purpose sealants in fire-rated applications
- Omitting backer rod
- Over- or under-filling joints
- Ignoring curing times
To conclude, fire-rated sealants might look like a minor detail, but they play a major role in maintaining fire safety and compliance. Done properly, they ensure your fire barriers perform when it matters most.
