Not sure which Anti foul has been used

[oakleyb]

What should i use when unsure of previous owners choice of AF

 

[Caer Urfa]

What should i use when unsure of previous owners choice of AF

International 'Primocon' primer, then you can put any make of antifoul ontop of it.

Mike

 

[VicS]

Primocon as above but you are very unlikely to actually need to do more than lightly sand unless the existing AF is something out of the ordinary or unless you are going to apply anything other than one the common AFs ( don't sand AF dry though)

International's compatibility chart may be useful, at least if you will be using an International product. If not see the website for the manufacturer of the AF you will be using.
http://www.yachtpaint.com/LiteratureCentre/antifouling-compatibility-chart-gbr.pdf

See also Internationals Boat Paint Guide http://www.yachtpaint.com/LiteratureCentre/1726 BPG 09_79 Page_Online_UK.pdf

Its a good idea to use one of the AFs popular in your area. For Portsmouth Hempel ( Blakes ) Tiger Extra probably
http://www.hempel.com/internet/ineukc.nsf/vDOC/207FB384E7139219C1256BE4004DF139?OpenDocument

Whatever you decide to use download the manufacturers product data sheet

 

[Twister_Ken]

And if you don't want to use an International product, Hempels also has a underwater primer that works a treat.

 

[tidclacy]

Why not try this, so much cheaper than International and does just as good a job. Have used it myself and their SeaQueen antifoul is the best I have ever come across.


http://www.shepherdmarine.com/primers/vinyguard-silvergrey-88

 

[vyv_cox]

My experience is that unless the present antifouling is a Teflon one, which I think you should be able to detect, there is little incompatibility between different antifoulings. Over the past eight years I have never used the same A/F in consecutive seasons, with products from five or six manufacturers. None has ever failed to adhere or perform in service. At worst, as VicS suggests, a light sanding should solve any such problems.

 

[Slow_boat]

As above. If in doubt, try a small patch. It's only high tech fancy teflon or water based stuff that you need to watch. I always just use the cheapest, one coat, though this years a couple of tins of different colours and different makes for £20 from a forumite meant two coats.

 

[VicS]

The compatibility problem at one time was the super-duper high strength AF that was in two parts could not be applied over a bog standard one.

At least it could but the solvent was not compatible with the standard stuff and that all crazed.

A friend was offered some ( International something or the other) at a price he could not resist and applied over his Blake Tiger. Ever since the bottom has had a mini crazy paving appearance. He should of course have used a barrier coat but he did not realise that

That problem may not exist now that the AFs specs have all changed, but it is somethng perhaps not to forget