Foam gaskets are fine, this summer we remove some
Raytheon wind and speed repeaters in the
cockpit of a 38 aluminium
boat to prepare for painting, as far i know the owner say they are 5 years stick it to the cockpit walls with no wáter ingress or
leaks , a fine coat of Boatlife clear silicone dont hurt , avoid use stuff like 3m 5200 or the 4000 or sika , 290 series , no no. clear silicone seal great and its easy to clean after years,,,