David C. wrote: > > I have an older <...> steel Thermos with <...> The cap gasket > leaks. I was thinking about <...> a bead of RTV silicone I've repaired similar gaskets by inserting a thin O-ring under the gasket. Might be worth a try instead of a bean of RTV - it's going to be difficult to get a uniform size bead of that... Tim Mullen