Thru hulls

regidog · #1 04-22-2008, 01:37 PM

What "bedding material" do you recommend when installing a thru hull within 6" of the waterline? The thru hull is made of nylon.

Bygracealone · #2 04-22-2008, 02:03 PM

5200?

tsubaki · #3 04-22-2008, 02:45 PM

If below the waterline, would it be too much of an expense to use bronze or stainless, so you don't have to worry about it later. I seen at least one nice boat on e-bay that sank from over tightening a thru-hull.
Like grace said 5200 or fastcure 5200 would do fine.

macojoe · #4 04-22-2008, 03:12 PM

I just bought a SS Thur hull today and my transducer (also Thur Hull) will be bedded in 5200!!

jasoncooperpcola · #5 04-22-2008, 09:08 PM

Use 5200. It says it right on the tubes "thru hull fittings"

regidog · #6 04-23-2008, 06:55 PM

thanks for the replies looks like 5200 is agreed all around. I think the bronze fitting may be a wise decision as well.

jasoncooperpcola · #7 04-23-2008, 10:00 PM

Buy Stainless you wont regret it. I'm planning to install ss thru hulls on my 250 Sportsman all the way around, just to lessen the worry about them breaking.

regidog · #8 04-26-2008, 09:58 AM

My understanding is the bronze is better below the waterline as stainless will lose its chromium coat and than is suceptable to corrosion where bronze just tarnishes.

#9 04-30-2008, 08:11 PM

5200 is considered a "permanent" adhesive/sealant and thru hulls sometimes need to be removed for inspection/replacement. I would use 3M 4200 or even Dolphinite, especially for an above the waterline application. We curse anyone who has used 5200 on items that have to be removed. You have to destroy things to remove them. Use it as an adhesive only!

Your thru-hull was 6" above the waterline so nylon or equivalent is more than adequate but bronze really doesn't cost much more so I'd use that instead.

Using quality clamps and hose is just as important as the thru hull and a siphon break is a good investment.

Seacrets · #10 05-06-2008, 09:45 PM

I agree with above. If you're using nylon and it's 6" above the waterline, you'll end up having to replace it someday. I do not use 5200 for anything above the waterline. Below is a different story. Select a good adhesive/caulk and you should be fine. I'd also recommend stainless. Just my $.02