Heat treated sleevings are coated with Silicone Varnish. A superior class 'H' insulating designed for Class 180 °C insulating systems, Silicone coated sleeving will conform to bends required in complex wiring systems without cracking or creasing even when held in such positions permanently. Reinforced with braided Fibreglass construction the silicone Varnish coating is extremely tough & flexible, withstands rough assembly handling and mechanical stress without the loss of insulating capability. Resistant to inorganic acids alkalis and aliphatic hydrocarbons.