HST-4 is a heat shrinkable tubular sleeve manufactured by DSG Canusa. It is made of high-performance polyethylene and provides excellent environmental protection, mechanical protection, and electrical insulation. The sleeve is flexible and shrinkable, allowing it to fit over irregular shapes. It is flame retardant and highly resistant to oil, chemicals, and ultra-violet rays. HST-4 is designed for demanding power cable and splice insulation applications, including joints and terminations. It is easy to install and is suitable for use in wet and dry conditions.