Replacing all my fish box & bilge hoses. Looking at the thru hulls looks like now would be a good time to replace them too. Which sealant would be approiate to use 3M 4200 or 4000 and do the metal thru hulls last longer than the plastic type?
The 3M 4200 is fine for sealing these.....I to like the brass or stainless fittings, but I've seen the plastic ones that are 20+ years old and still working fine. So it' really one of those "how much do I want to spend" thing.
