The custom coolant hoses is often made with silicone and 3 ply polyster reinforcement (4.5mm wall thickness) and  4 ply polyester reinforced (5.0mm wall thickness). The coolant hose made in silicone material has higher temperature rating than traditional rubber coolant hose. Temperature Resistance: -55 degree C to 200 degree C max. It can retains flexibility and resitant to cracking, ozone attack, sunlight and many chemicals.

The custom coolant hoses is designed to handle vacuum and connections that require bends and curves. It can be applied to some working environments such as water-air coolant-boost-small amount of oil mist. It can be used for meeting the high demands of the engine compartment of automobiles and large diesel trucks to off road heavy equipment and power generators. Custom coolant hoses meets requirements of SAE J20 R4 specification.