The Viton® fluoroelastomer resists chemicals and oil. Temperature range is -15° to +400° F. Durometer hardness is A75. Meets ASTM D2000/SAE J200. Color is black. vs: Silicone has good resistance to low and high temperatures. Temperature range is -65° to +425° F. Durometer hardness is A70. FDA compliant. Color is red-orange
The Silicone for me lasted longer when I had the Q pipes vs the Vitron