I don't recommend the use of silicone sealants... While they have their uses, they also have a major drawback. If you use one, and it ever leaks again, you'll be hard put to get it resealed. The silicone in them will permeate the substrate (the filon panel and the metal frame) and will prevent any other caulking effort from sticking. That's why all the sealants made for RVs and boats do not contain silicone; most are butyl rubber with some having some additional additives (not silicone) to make them "better" than the other brand (mostly advertising gimmicks, but, some additives, UV stabilizers, anti-fungus, etc. are useful). If they ever leak, they don't leave a residue that prevents a re-caulking from sticking to the surfaces.
Silicone actually migrates...moves from the initial point of application (that's a result of it being slippery - it won't stay where you put it). There are studies showing that within hours of application on hinge, for example, silicone can be found on many surfaces in the area, many feet away. That "feature" is one of the reasons I stay away from most everything, now, that contains silicone, especially the sprays. If, for example, you need a spray lubricant, Teflon is much better at staying where you want it and not contaminating the area around where you spray it.