Glazing Fire Resistant Glass into Timber Frames Fire resistant glass is rated with varying levels of protection defined by time periods designated by European Standards. Time periods are indicated in minutes in terms of either integrity or integrity & insulation values. The type of glass and glazing materials should be installed as part of a certified glazing system in order to ensure that the rating of the assembly is achieved. 30, 30FD and 60 Intumescent Strip Sealants are tested and approved for use with various fire resistant glass types, as part of a system, in order to achieve the specified rating required. Hodgson Sealants Firestrip® Other than glass type; variables such as glass size, frame type, frame / bead density must be observed prior to selecting the system required in order to uphold the fire rating. 30, 30FD and 60 Intumescent Strip Sealants are tested and approved for use as seen in our CF297 Certifire Document. This Certificate of Approval relates to the fire resistance of various Firestrip® glazing methods when used in timber screens and timber door leaves, for a period of 30 or 60 minutes fire resistance, as defined in BS 476: Part 22: 1987 subject to conditions. products with different glass types. The full design method must be observed on the relevant page of the full copy of the Hodgson Sealants Certifire Certificate No. CF297, which is available below