All Grayson silicone hoses are made from 100% silicone. This high quality silicone provides increased pressure tolerance and longevity against high temperatures.
Polyester reinforcements are embedded into the silicone to provide maximum strength and durability during use. A unique silicone liner ensures there is no coolant loss through wicking and helps improve the life of the hose.
Grayson silicone hoses meet the latest automotive standards including SAE J20 R1 Class A. We are so confident in the quality of our hoses that all, including our four ply options, are backed with a 5 year warranty.