The Norseal Glazing Gasket TF115BK is a Slim-line version of the TF130BK, for use in conjunction with insulating and laminated glasses. It comprises a high performance glazing seal incorporating proven intumescent which will expand to many times its original volume when subjected to heat to enhance the performance of fire rated glass. Fitting is completely dry and clean - no mastic or wet sealant is required, the system offers a pre-formed sight line.