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Allproof Drop in fire collars are made from galvanised steel and installed in conjuction with intumescent sealent. Our product provides a simple and effective passive fire rating option for thin concrete floors or trapezoidal steel tray concrete floors. These floors feature profile changes on the underside of the slab and make it difficult to fire rate with a conventional fire collar fixed to the underside of a floor slab.
Installation of Allproof Passive Fire Protection Products must be carried out by contractors experienced in the principles of fire rated construction. Please ensure testing has been completed for specific install requirements.
The product will, if employed in accordance with the supplier's installation and maintenance requirements, assist with meeting the following provisions of the building code:
All performance requirements stated by AS1530.4 — 2014 and AS4072.1 — 2005.
Allproof fire collar product and technical data BRANZ Appraised — Appraisal No. 1088 
This product has been used in a wide variety of projects using a com floor since its launch.
Most plumbing merchants who are located in areas that service tradespersons constructing multi level buildings (i.e. Auckland city centre) now stock this item on their shelves due to its popularity.
At the core of the Allproof passive fire protection product range is the advanced intumescent technology. This enables Allproof to offer products with performance and design advantages for engineers and installers of passive fire protection products.
Allproof’s intumescent material expands when exposed to heat and as its volume increases with significant expansion pressure, it produces a stable char. The intumescent char formed is a poor conductor of heat, retarding heat transfer and retaining the integrity and insulation of service penetrations through otherwise fire-resistance rated walls or floors.
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