Firetherm Rainbar consists of a range of purpose designed intumescent seals to protect various cavity sizes. They fix directly to the inner wall of a rain screen cladding without restricting air flow through the cavity. Rainbar 60 is a PVC sleeved intumescent strip suitable for cavities up to 25 or 50mm. Rainbar Pro comprises a rigid steel carrier lined with intumescent to protect cavities up to 100mm. For larger or insulated cavities, Rainbar 60 Plus is a high density foil-faced mineral wool slab with intumescent closer bonded to its exposed edge. Rainbar seals are 1200mm lengths and are secured to the inner wall using suitable steel screws, or a split fixing bracket for Rainbar 60 Plus. All fixings are installed at 300mm centres.