SAFETY & SECURITY 79
Introducing Nullifi re FZ400: The Pioneering ‘Movement-Tested’ Fire Stopping Solution
N
ullifi re, a leader in passive fi re protection innovation,
unveils FZ400 – a cutting-edge fi re
stopping product designed to accommodate movement, while maintaining the integrity of compartmentation.
Powered by patented GXT Technology, FZ400 provides the necessary continual relief of fatigue on fi re stopping seals under defl ection stress and protects service penetration seals with outstanding fi re performance and movement-resilience. The FZ400 has been rigorously tested to EN 1366-3/4, achieving up to two hours fi re rating after undergoing cyclic movement, proving its effectiveness in real- world scenarios where structural movement is inevitable. Using Nullifi re’s pioneering ‘Movement
Test,’ developed with the support of Warrington Fire, the FZ400 was subjected to a groundbreaking procedure that replicates ceiling defl ection. A wall was moved up and
proudly
resistant fi lm provides a cold smoke seal. This provides both fl exibility and excellent fi re stopping properties.
The results were outstanding: No ripping, cracking, or fi bre migration; Maintained a secure, air-tight fi re seal; Up to two hours of fi re resistance maintained. Hannah Eyres,
technical manager at
down by 30 mm more than 50 times over a two hour period, then placed in a furnace to assess performance post-movement. FZ400 is a graphite impregnated open cell foam with a highly expansive char when exposed to heat. The water
Nullifi re, explained “Our Movement Test provides a complete framework for testing how GXT Technology adapts to real-life building pressures. We’re proud to share a test that reinforces our drive toward data- driven solutions and gives architects and contractors complete confi dence in FZ400. Feedback has been very positive. Architects and Main Contractor clients demand data driven solutions so the development and success of this test will be well received in the Construction Industry.”
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ADF OCTOBER 2025
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