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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, FyreBOARD 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.