Originally Posted by Stig
Just do a search for food grade RTV silicone (RTV means room-temperature vulcanizing). RTV is commonly used for automotive gaskets, but I don't know if the parts store stuff is food-grade. A quick Google search came up with this http://www.emisupply.com/catalog/su5...be-p-2286.html
Even the non-food grade stuff seems pretty harmless. It is stable up to 450 F. If you are getting that hot on you intake pipes, you would have some scorched unedible meats anyway I think.