MaxiCollars™
BOSS MaxiCollars™ are high-performance retrofit fire collars designed to seal combustible pipes and lagged metal pipes where they pass through fire-rated walls and floors. Manufactured with a durable steel casing containing an advanced intumescent lining, they expand rapidly in a fire event to crush, seal and close the internal pipe bore, preventing the spread of fire, smoke and hot gases between compartments. With a low-profile depth of just 30–40mm, MaxiCollars™ provide outstanding performance even in tight access areas or congested service clusters.
Available in a wide range of sizes, BOSS MaxiCollars™ are approved for use across numerous substrates including concrete, masonry, fire rated plasterboard, AAC/Hebel, Speedpanel, concrete floor slabs, CLT & BOSS Batts™. They offer extensive test approvals to AS1530.4:2014 & AS4072.1-2005, achieving FRL ratings of 60, 90, 120 and 240 minutes depending on system configuration. MaxiCollars™ support various combustible pipes up to 160mm diameter and insulated pipes up to 250mm dia including lagging. MaxiCollars™ have approvals for uPVC, cPVC, HDPE, PP-R, PE, PP-MD-PP, PEX/PEX-AL, and insulated steel, copper and iron pipes.
Applications
- Combustible pipe penetrations
- Lagged steel, copper & iron pipes (with Thermobreak®)
- uPVC DWV, uPVC conduits and cPVC sprinkler pipes
- PEX water, PEX-AL gas, HDPE and PP-R pipes
- A/C paircoil bundles and multi-service risers
- Fire-rated walls, floors and ceilings
Key Benefits
- Up to 240-minute FRL performance
- Only 30mm / 40mm deep — ideal for tight installations
- High-expansion rate intumescent technology
- Tested in a wide variety of substrates
- Suitable for new builds and retrofit environments
- Low profile allowing fitment close to bends or elbows
- Fast installation with less mechanical fixings
- Approvals for angled pipes and elbows and sockets
- Approved to AS1530.4:2014 & AS4072.1-2005
Testing
BOSS MaxiCollars™ have extensive fire test approvals including AS1530.4:2014 and AS4072.1-2005, achieving 60, 90, 120 and 240-minute FRL ratings depending on substrate, pipe type and installation detail.
They are suitable for installation in a wide range of certified systems across plasterboard walls & ceilings, concrete/masonry walls, floor slabs, Speedpanel, AAC/Hebel, Comflor and cross-laminated timber. Performance must be confirmed using the BOSS Fire System Matrix, which provides configuration-specific system evidence, annular gap requirements and accessory recommendations.
