I have a cheap whirlpool oven. The bottom heating element has an aluminum foot in 2 places that rests on the floor of the oven. When the oven is heating up the foot moves on the floor of the oven and squeaks. I know this is the source of the squeak because I put a quarter under the foot and the squeak stopped. My wife doesn't like quarters in the oven. What material can I use to put between to oven floor and the foot, that is safe, wont outgas and will stand up to the heat? even better if its the dark blue color that move oven insides are.