Please find below our extensive range of woven and knitted ladder door seals produced from E Glass, HT750 Glass, Bio Soluble, Silica and Ceramic fibre. The different fibres used depend on the temperature of the oven / furnace / kiln and boiler. These tapes are specially designed with the middle warp yarns removed to create a "ladder" effect which allows the tape to be fitted over bolts. This is also known as bolt hole tape. Please click here to determine which fibre to choose.