Silicone Coated Exhaust Lagging is used for several reasons. 

Firstly, it provides excellent insulation properties, reducing the temperature around exhaust pipes and preventing heat damage to surrounding equipment. This can improve the efficiency and lifespan of the equipment. 

Secondly, it has good corrosion resistance, which is important in marine and industrial environments where exposure to saltwater and chemicals can cause damage. 

Thirdly, it can reduce noise and vibration, improving comfort and safety for workers and passengers. 

Overall, the use of Silicone Coated Exhaust Lagging can help to improve the performance, durability, and safety of equipment in a range of applications.