Norseal can offer a wide range of intumescent materials, available to purchase in sheet form. Interdens® Type 15 intumescent sheet is an alternative to the graphite-based sheet on offer and is a truly versatile product suitable for a number of applications.
Norseal sell these sheets in a variety of sizes at a thickness of 1mm (if you have a particular size requirement, please get in touch with our technical department). It can be purchased with or without self-adhesive. Interdens® main material - Mono Ammonium Phosphate - is seen as low pressure activating, meaning that you get less pressure forming during its expansion in a fire situation.