Pyrostrip® 300 has been developed for use with various types of fire resistant Glass, to provide at least 30 minutes fire resistance in accordance with Bs476 Part 22: 1987.Pyrostrip® 300 is a phosphate based multi-component intumescent system. Under the action of heat, the components react chemically to form a soft, high volumetric expanded char that will seal gaps which occur during a fire. Pyrostrip® 300 also has insulating properties to protect substrates such as Timber, when exposed to fire. Pyrostrip 300 is 2mm thick.