you want Permatex "Ultra Copper"- http://www.permatex.com/products/aut...sket_Maker.htm

It is in a squeeze type tube and is copper/orange in color. It is a high temp, non-corrosive, fuel resistant gasket maker- ie.- you can use it on a real engine in place of a gasket.

Clean your engine well so it adheres good. Use liberally around the carb to ensure you do not block any passages.