While rubber hoses are standard for radiator hoses, silicone hoses have a greater resistance to heat, and they are more durable and longer lasting. It's for this very reason that replacing your coolant hoses with silicone hoses gives you more peace of mind
The idea of a silicone hose is that you replace the standard hose so it doesn't expand and get hot under pressure. Silicone hoses are capable of carrying fluids at much higher temperatures than rubber. If you're building a racing vehicle or adding a turbocharger to your engine, silicone is the way to go.