Primocon or Jotun Vinyguard Primer

[FulmarJeddo]

It is disappointing but not surprising that the OP places more reliance on the advice of a shop assistant than that of folk who actually have exerience of using the products, it has always been thus.
On the one hand you have a person whose motivation is to sell a more expensive product increasing his turnover and profitability while avoiding having to broaden his stock, on the other you have the PBO forum ethos, helping each other to find cheaper, better or easier solutions to problems which hopefully might also encourage suppliers to think about the value of what they offer. A shopkeeper's task is to make a profit and they are entitled to that but for many of us here it is to control the absurd costs of maintaining a boat.
If we continue to share information about value for money or better ways to do things and all act on that knowledge, you might hope that it might encourage those whose job is to sell us stuff to think that they might be better to offer value, because if they do not it will be exposed with consequent loss of business?

Sorry, I think either my comment was unclear or you misunderstood what I was saying. When I told the chandler that I was going to use Jotun primer, he was saying that he couldn't get it to sell in his shop as it was aimed at the commercial market. He wasn't trying to push me in the direction of the products he sells, he was saying it was a similar product and compatible with the A/F I was buying. Presumably his suppliers don't supply Jotun products.

I bought a can of Seajet Shogun as I have a full can left over from last year and didn't want to mix antifouls in one application.

I will be using Jotun primer based on what I read earlier and what has been said on this thread. Thanks.

 

[Quandary]

Sorry, I think either my comment was unclear or you misunderstood what I was saying. When I told the chandler that I was going to use Jotun primer, he was saying that he couldn't get it to sell in his shop as it was aimed at the commercial market. He wasn't trying to push me in the direction of the products he sells, he was saying it was a similar product and compatible with the A/F I was buying. Presumably his suppliers don't supply Jotun products.

I bought a can of Seajet Shogun as I have a full can left over from last year and didn't want to mix antifouls in one application.

I will be using Jotun primer based on what I read earlier and what has been said on this thread. Thanks.

My apologies, I misunderstood, glad you got the right stuff. You will find the bigger tin of Vinyguard easy to use and useful for priming metal anywhere not just on the boat and it keeps well, probably worth ordering the thinners with it?

 

[Graham376]

Another vote for Vinyguard, I have been slapping primer on boats since the days when Primocon was full of bitumen which bled through your TBT and have not used anything better. The Jotun stuff is a superior product, more versatile, it comes in bigger tins but keeps well for years and the prices are not nearly as silly.

Hard at work with trusty scraper (must be a masochist) removing several years buildup of Seaforce from Gelshield 200. Very light sanding will be needed but some thin antifoul will remain in places. Does the Vinyguard stick OK to sound antifoul as well as gelcoat? Interestingly, Jotun's tech sheet say Vinyguard 88 is suitable for steel, doesn't mention grp. Overcoating antifoul will be Seaforce 30M as usual.

 

[Quandary]

If you get the surface smooth I am confident the primer will be grand.

 

[Graham376]

If you get the surface smooth I am confident the primer will be grand.

OK thanks, how many coats do you suggest - two? Just had price, quite cheap @ €5.13/L + 23% IVA. 10L should give 2 good coats on 38ft hull.

 

[Quandary]

I think one is usually enough but if you want to use it all two should still give a smooth finish. I have been using it over 2 pack epoxy to assist the adhesion of the AF so more concerned with its durability than its protective function. However I did paint a steel cradle with the surplus and even without overcoating it kept the rust at bay.

 

[Graham376]

Thanks Quandary, will just give it one coat then should have enough left in the can to touch up any missed bits. Just using as safeguard to make sure new antifoul sticks.

 

[zoidberg]

I had superb guidance from SML Paints and the Jotun technical rep... who came by twice when I indicated I was soda-blasting layers of old a/f on a 'project'. I got down to a layer of what he designated VC Tar, stopped me there saying that was a sound substrate, and recommended Vinyguard straight on top. That was followed by SeaQueen 88 ( which I was then able to buy ) which bonded chemically to the Vinyguard. All sound as a pound.

I'd recommend getting specific advice from the Jotun tech rep and/or SML on your specific substrate. It's a free consultation....

 

[Graham376]

I'd recommend getting specific advice from the Jotun tech rep and/or SML on your specific substrate. It's a free consultation....

Thanks but not in the UK and I know what the substrate is as I epoxied the hull some years ago. Gelshield requires a primer if antifoul isn't applied immediately after final coat, hence the need for Vinyguard now I'm stripping back to mostly gel.

 

[rudolph_hart]

I'd recommend using Jotun 2-pack epoxy metal primer, which is specifically designed for priming metal that isn't 'bright' e.g. not super clean, such a cast iron keel. It contains aluminium powder.

It's very impressive stuff - I did my (large) wing keel almost 10 years ago & it's still in excellent condition.

First a wire brush on an angle grinder (NB protective measures) then brushed on rust converter (I used the Hammerite one). Then applied the Jotun Primer.

It's so viscous that it's virtually impossible to brush on without thinning, so the first coat should be very thinned so it 'soaks in'. Then fill & flat any imperfections before applying thicker 2nd coat.

Then antifoul primer, followed by antifoul.



Hope this helps.

 

[savageseadog]

When it comes to keels, you can never put too much on, the thicker the better. Wait between coats and consider spraying to get a clean finish.