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FyreBOARD Maxilite is a lightweight calcium silicate board material that can be used in a large range of passive fire applications. Where deck boxes and/or cast-in conduits are set into concrete floor slabs, FyreBORAD Maxilite has been approved for use as a compliant penetration system when installed to the soffit of the slabs. Services that pass through the FyreBOARD Maxilite such as cables, can be sealed with FyreFLEX sealant and continuous PVC conduits may be treated by installing a FyreCHOKE retrofit fire collar, fixed into the FyreBOARD Maxilite as shown in the installation drawings to achieve an FRL of up to -/120/120.