All_at_Sea
Active member
I am just about to start on my keels. What metal primer do people use for underwater use?
Buy the 5 litres, you will be repeating the job over and over.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!
Buy the 5 litres, you will be repeating the job over and over.
Why pay £120 for 5l of Metalshield compared with £35 for Vinyguard, particularly if you say it does not work anyway?Dulux Trade Metalshield Zinc Phosphate primer. Everything rusts through & has to be redone, so may as well compromise a little on price
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.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.