Barrier Coat Advice

[Gixer]

I’ve decided to take all the antifoul off my boat as the parts that were flaking were getting larger. After 5 hours of scraping and only 5th of the way through I’m regretting this decision, but here we are.
The hull is sound with low moisture levels so I was planning to just paint with Primocon and antifoul.
Something is telling me that I should think about a ‘barrier coat’ and I’m interested in your advice on if to bother or just carry on.

 

[seumask]

I would take the oppertunity when clean to put on a barrier coat. I would go for at least 2 coats of an epoxy based primer. Probably a High build type for a thicker coat with less layers. I am in the process of scraping by my 37 ft boat and nearly ready to apply the epoxy based primer. Its only taken nearly 20 hours of scraping with a bahco 665 scraper. This is by far the best scraper I have used so far.

I think this is a good example of a an epoxy primer, that has a farily wide range of temperature application to be considered carefully at this time of year !

SML Shield High Build Epoxy Primer | 2-Pack | SML Paints

Good luck

 

[ducked]

How would epoxy tar, (if that is still avaiable) compare?

Cheaper? More protective of keels?

https://www.titanlux.es/en/productos/producto/epoxy-tar-833

Steel and concrete listed as substrates. No mention of GRP.

https://www.chmarine.com/International-VC-Tar-epoxy-primer/

This one does, Not cheap, but then its International, so has expensive "yachtiness" built in.

Since my boat has been out of the water for 4-5 years (though it has probably had quite a lot of freshwater inside it for much of that time) now (or more realistically next summer before hopefully going back in) might be the time.

Dunno if I can be bothered with all that scraping yet though. Wasn't a lot of AF paint buildup on the hull

 

[dansaskip]

I remember similar thought to yours when I scrapped all the old antifoul off my first boat several years ago but keep at it - it is worth it. Mind you faced with the task again on my second boat I paid some contractos to have it blasted off but it was expensive. I then had two coats of epoxy applied. Worthwhile if you have got it clean enough but just remember careful prep is the key to success if you dint want it peeling off at some later stage.

 

[Gixer]

Thanks guys, I've just looked into the different barrier coats. You have to be careful with temperature and moisture, am I asking for trouble trying to do it this time of year?
I'm wondering if I leave it for a few years and come out in the summer and do a proper job. I wasn't planning to strip it back, its only that its flaking quite a bit, argh..