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Pilkington Pyrostop® is optimised fire-rated glass for structural fire protection for fire resistance classes EI 30 to EI 180 in accordance with /EN 13501-2/ for installation in partition walls, façades, roofs and openable fire separating elements such as fire-rated doors. It is suitable for vertical, inclined or horizontal installation for both interior and exterior applications. Fire protection systems with Pilkington Pyrostop® can fulfil the requirements of the respective fire resistance class regardless of the direction of installation. Pilkington Pyrostop® consists of several thin float glass panes with intermediate special alkali silicate-based fire protection interlayers. This structure achieves full thermal insulation by providing basic integrity and complying with the insulation criteria when subjected to standard fire exposure conditions. Heat transfer within the protected area is significantly reduced and the supporting constructions are verifiably cooled due to additional foaming of the intermediate interlayer into the glass rebate. As an integral component, a special circumferential edging tape is applied to protect the interlayer structure.