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Primer sealer for metal bilge keels

Tranona

Well-known member
Joined
10 Nov 2007
Messages
33,276
Another vote for Jotun - however you have to buy 5l, so although per litre it is much cheaper you may find Primocon lower cost as you can get it in smaller quantities!
 

Bilgediver

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Joined
6 Jun 2001
Messages
6,878
Location
Scotland
Buy the 5 litres, you will be repeating the job over and over.
That could be the answer. I have always used a coat of Primocon as a tie coat between successive coats of antifoul on my Westerly. The keels were last fully treated around 1990 when grit blasted to clean metal and Primconned immediately . There has been minimal rusting since which is always dealt with by taking back to polished iron and repeating as before using antifoul/Primocon.
 

Tranona

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Joined
10 Nov 2007
Messages
33,276
Dulux Trade Metalshield Zinc Phosphate primer. Everything rusts through & has to be redone, so may as well compromise a little on price
Why pay £120 for 5l of Metalshield compared with £35 for Vinyguard, particularly if you say it does not work anyway?
 

Spirit (of Glenans)

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Joined
28 Mar 2017
Messages
1,892
Location
Me; Nth County Dublin, Boat;Malahide
That could be the answer. I have always used a coat of Primocon as a tie coat between successive coats of antifoul on my Westerly. The keels were last fully treated around 1990 when grit blasted to clean metal and Primconned immediately . There has been minimal rusting since which is always dealt with by taking back to polished iron and repeating as before using antifoul/Primocon.
Apologies for the thread drift, but in another thread very recently the balance of opinion was that apart from rust-treated areas of the keel, you don't need a coat of Primocon under every coat of A/F, just scrape any flaky bits and patch with Primonon, then lightly wet-sand the rest and apply new A/F directly on top of old. It's what I've been doing over twenty years of boat ownership and volunteer work on club boats.
 

barnicaljohn77

New member
Joined
24 Sep 2016
Messages
4
I have metal keels on my Alouette,,which have always been a problem. I used 2coats of polyester resin originally, after having them blasted clean . Then antifoul on top.It lasted for years. But now I'm considering having them galvanised. Is there any downside to this?
Thanks, B.
 

Tranona

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Joined
10 Nov 2007
Messages
33,276
Galvanising is fine - shot blast first. However you will of course have to remove them first! You did well to get polyester resin to stay stuck to steel. If you don't want to remove them and can blast in situ then 4 or 5 coats of epoxy is perhaps the most effective way of keeping them protected.
 
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