Waterproofing Prototype

I've been researching homemade silicone molding because it's cheap, available, and doesn't require any exotic tools. So far, I've make a negative mold of the cane handle, and I will be casting a prototype model this week. I've also embedded a vibration motor in silicone to test the resonance of the material, and so far it seems like a decent solution to waterproofing.