12 years of Antifoul Removed what next

[Trevor144]

Having just finished scraping all the antifoul from a 12 year old Beneteau Oceanis 361 I'm not sure if I need to seal the hull in anyway before applying new antifoul.
I have had mixed advice from applying 5 coats of Gel seal 200 to just going straight on with the antifoul after cleaning the hull down with white spirits, but no one I have spoke to has actually done it.
Any practical advice out there from those who may have done similar work would be greatly appriciated.

 

[Plevier]

Lots of good info here http://www.smlmarinepaints.co.uk/files/library/files/Painting_Guide.pdf
and talk to Malcolm at Shepherd Marine for more advice
http://www.smlmarinepaints.co.uk/

Jotun stuff is very good and a lot cheaper than International or Hempel.

 

[VicS]

Having removed all the antifouling now is a good time to apply an epoxy coating such as Gelshield 200.
Its not a job to be undertaken lightly however.

Also the time to consider the merits of Coppercoat

 

[G12]

As you mention, you could just paint her again in the usual fashion but having gone to the trouble of scraping her then surely it's worth the extra trouble of gelshield and coppercoat as Vic mentions.
If I was going to gelshield her then I'd have some proper moisture readings taken beforehand to make sure I wasn't sealing any excess moisture into the laminate first. I take it she's been out of the water a while at the moment?

 

[Plevier]

Also the time to consider the merits of Coppercoat

Indeed.
I'm at the about to start scraping stage on an 8 year old boat. If the scraping goes well and I bare it all over I'll certainly think about Coppercoat. It would cost about 4 times as much as the Jotun a/f I think. In either case epoxy first is recommended (because a high build epoxy like Jotun HB or Gelshield is more water resistant than Coppercoat even though it's epoxy).
If the scraping doesn't go so well all over I expect I shall just do a coat of Jotun Vinyguard over what's on - I don't know what it is - then 2x Jotun SeaQueen.
I used Jotun HB epoxy, Vinyguard primer and Sea Guardian a/f on previous boat (after blasting) and was very impressed.

 

[Skylark]

Having just finished scraping all the antifoul from a 12 year old Beneteau Oceanis 361 .

Hi Trevor, I guess you're now well practiced in the art of antifould removal. I also have a 361. Would you like to hone your skills

Any particular lessons learned or just hard graft?

 

[longjohnsilver]

Having removed all the antifouling now is a good time to apply an epoxy coating such as Gelshield 200.
Its not a job to be undertaken lightly however.

Also the time to consider the merits of Coppercoat

Yes but you do have to make sure the hull is very dry otherwise you will end up with a problem ie moisture trapped in the hull and potential osmosis issues.
Don't ask how I know this.............

 

[doug748]

I have a boat that had Gelshield applied about 20yrs ago and it is holding up ok. I gave another boat the treatment myself; the stuff brushes well and is very nice to apply. As with all paint jobs the hull must be well prepared for long tern success.
Both of these boats were old uns, your 12 year old job may have more advanced vinyl resins. It would be worth finding out before you decide

 

[fastjedi]

It's true that Coppercoat doesn't provide the same level of protection as epoxy because it's full of impurities (namely copper). However, it will offer some protection .... perhaps enough on a modern boat like yours. Having said that we stripped, epoxied and coppercoated ours last year and are very pleased with the result (so far)

If you chose a solvent epoxy like Gelsheild you need to be sure all the Solvent has evaporated before applying the Coppercoat ... and International won't commit to how long that is! If solvent is trapped you may get blisters.

If you use Solvent free epoxy it will go on in two coats (because it doesn't evaporate) + no risk of trapped solvent. However, it is less tolerant to temperature and humidity. In this case you really need at least three consecutive days of good weather, one for each epoxy coat and one for 4x Coppercoat .... oh! and ideally another couple of days for the Coppercoat to cure.

I was carrying out all sorts of experiments in March.... one on the patio, one in the garage, one on the kitchen wndow cill and one on the living room radiator to understand the curing behavior. At that time we hadn't anticipated we would be applying during the warmest April for 100 years.

 

[Caer Urfa]

Having just finished scraping all the antifoul from a 12 year old Beneteau Oceanis 361 I'm not sure if I need to seal the hull in anyway before applying new antifoul.
I have had mixed advice from applying 5 coats of Gel seal 200 to just going straight on with the antifoul after cleaning the hull down with white spirits, but no one I have spoke to has actually done it.
Any practical advice out there from those who may have done similar work would be greatly appriciated.

Hi Trevor
Did just what you are doing last year over the winter, removed all the old antifoul back to the gelcoat, power washed her down and left until Early April to not only dry out buy warmer weather.
I had excellant support from International paints and although it may say Gelshield 200 can be applied from +5 Deg C they said best apply it at more nearer 9/19 degrees as the nights are still cold.
I wrote a paper on it for the Colvic Watson Group so maybe this might help
http://f1.grp.yahoofs.com/v1/UJsQT3...chnical Information/Removing Old Antifoul.pdf

You have done the hard dirty work so now finish the job and protect your investment!
Mike

 

[Bosun Higgs]

Having just finished scraping all the antifoul from a 12 year old Beneteau Oceanis 361 I'm not sure if I need to seal the hull in anyway before applying new antifoul.
I have had mixed advice from applying 5 coats of Gel seal 200 to just going straight on with the antifoul after cleaning the hull down with white spirits, but no one I have spoke to has actually done it.
Any practical advice out there from those who may have done similar work would be greatly appriciated.

Step 1 - epoxy the hull if it is dry enough
step 2 - apply coppercoat and you wont have to repeat the hull stripping in 12 years time.

Thats what I have done and I'm delighted with the results after 2 years in the water. I will never use conventional antifoul again in my sailing life

 

[Sandy]

I wrote a paper on it for the Colvic Watson Group so maybe this might help
http://f1.grp.yahoofs.com/v1/UJsQT3...chnical Information/Removing Old Antifoul.pdf

Sadly, the link does not work for me

I get the error message "The document you requested could not be found"

 

[Trevor144]

Thank you for all the replies, I am clear now about what needs doing and what my options are to complete the job. Had not considered the coppercoat option so thanks Troubadour for reminding me of that route.

 

[Caer Urfa]

Sadly, the link does not work for me

I get the error message "The document you requested could not be found"

Hi Gorf
I have just pressed on the link 'on your own post' and it connects fine, sorry I cannot help you further or send me your Email address by PM and I can send you a copy.

Mike

 

[macd]

"high build epoxy like Jotun HB or Gelshield is more water resistant than Coppercoat even though it's epoxy"
"It's true that Coppercoat doesn't provide the same level of protection as epoxy"

The Coppercoat people used to claim that their product had some barrier-coat properties. They don't any more, cos it doesn't to any great degree. If the resin were water-impermeable, how on earth would the copper work to deter critters? It'd be sealed. Coppercoat resin, incidentally is 50% water.

 

[SailorBill]

Hi Gorf
I have just pressed on the link 'on your own post' and it connects fine, sorry I cannot help you further or send me your Email address by PM and I can send you a copy.

Mike

I don't need the document myself but as a test I clicked on the link in your other post and got the same "document not found" message. Could it be that you have to be logged in to your group to get access?

 

[Clyde_Wanderer]

Is this Copper coat an antifouling or what?
I have heard of it but nut sure what its all about.
C_W

 

[Twister_Ken]

Is this Copper coat an antifouling or what?
I have heard of it but nut sure what its all about.
C_W

Yes, an antifouling that if correctly applied has a life of at least ten years.

http://coppercoat.com/

 

[Skysail]

I was just typing what TK typed! I am not a user but definitely will apply Coppercoat on my next boat.

.

 

[Clyde_Wanderer]

Yes, an antifouling that if correctly applied has a life of at least ten years.

http://coppercoat.com/

10yrs, is it suitable for wintering ashore withiut it drying and flaking off?
Thanks.
C_W