AIS FR Board – FP 409 is designed to prevent the spread of fire and smoke through openings in fire rated walls and floors where openings are formed to allow the installation of multiple building services. FP 409 will also maintain the acoustic design performance in fire rated walls and floors.

FP 409 consists of a high density stone wool core, over-coated with AIS FR Coating – FP 604. The top coating provides additional protection by significantly reducing the permeability of the stone wool core and prevents the passage of hot gases, thus reducing the temperature rise on the unexposed side and reducing heat conduction through the building services.

FP 409 is available with top coating on one or two sides, selected on the basis of installation considerations and fire resistance. On site, FP 409 must be used together with AIS FR Acrylic for sealing around building services and the surrounding construction.

The sealant has undergone tests to BS EN 1366-3 for fire protection joints and tested in accordance with EAD 350454-00-1104 to demonstrate its suitability for use at temperatures below 0°C.