Swaging questions

[Renoir]

In general, silicone "sealers" should be avoided on boats because there is no reason to expect silicions to adhere or remain adhered to surfaces, especially metals. Once silicon contaminates a surface it is extremely difficult to remove and REAL adhesives and sealants will thereafter NOT adhere at all!

Silicon can make good gasket material (if formulated as such) when mechanically confined and compressed between appropriate surfaces. Any other applications are, in general, better solved by other materials.