Time gap between anti-fouling and re-launch?

[Robert Wilson]

Must there be only a day max between slapping the stuff on and re-launch, or can it be done a week, two weeks even four weeks in advance?
In the past I've done it within two days, but this year that may not be possible.
Does it matter if it is left for weeks, or does it lose its A/F properties?


I have a hectic schedule between now and the last possible date for re-launch in time to make a "muster" on Mull in early May.
I'll be away for four weeks (March/April) and need to have the boat and myself completely ready by April 29th April.
I have a max window of the next two weeks before a panic window in late April.

TIA, as usual :encouragement:

 

[John 32i]

Depends on the anti foul - we use seajet 33 and that says immerse within 6 months; we took advantage of the warm weather to slap some on 2 weeks ago and we won't launch until April

 

[VicS]

Must there be only a day max between slapping the stuff on and re-launch, or can it be done a week, two weeks even four weeks in advance?

As already said it varies between different anti-fouling. You don't say what you will be using!

Read the technical data sheet for the anti-fouling you will be using. It should tell you the minimum time to allow before immersion, which may vary with ambient temperature, and the maximum time, which may be up to 6 or even 12 months.

 

[oldgit]

Minimum time ? Frequently usually how long it takes for the tide to return after last brush stroke.
Only ever used budget soft A/F
Could be as little as an hour or two if things do not go to plan.

 

[Robert Wilson]

As already said it varies between different anti-fouling. You don't say what you will be using!

Read the technical data sheet for the anti-fouling you will be using. It should tell you the minimum time to allow before immersion, which may vary with ambient temperature, and the maximum time, which may be up to 6 or even 12 months.

Cruiser Uno. Annoyingly the tin(s) have a plethora of painty-handprints all over the blurb!
I'll get onto the International website.

Thanks.

 

[Robert Wilson]

John32i and oldgit.
Thank you.

I usually do a "between tide" if applying an extra coat mid-season, but this season I need to get a good coat on. I put on two coats last year - red first then blue on top - and the red is only just showing through at the heavy wearing areas.
I would like an effective/efficient "top coat" of more blue but now wonder if the red underneath may be ineffective.
I don't feel like wasting time and money by re-coating too soon before re-launch , on the other hand, my time is limited and the boat is 40 miles away at Ullapool - so it's not just like other years when she was in the driveway!

 

[webcraft]

.
Can you reactivate old antifoul by wet-abrading it with a Scotchbrite pad, and if so can you then put another coat on top?

Reason I ask is, we antifouled Avy-J a6 months ago - 2 coats - then sailed her 16 miles and lifted her out. Relaunching beginning of May.

- W

 

[Graham376]

.
Can you reactivate old antifoul by wet-abrading it with a Scotchbrite pad, and if so can you then put another coat on top?

Reason I ask is, we antifouled Avy-J a6 months ago - 2 coats - then sailed her 16 miles and lifted her out. Relaunching beginning of May.

- W

Again, it depends on make of antifoul but, it may be OK with a surface abrade and no further coat.

 

[VicS]

Cruiser Uno. Annoyingly the tin(s) have a plethora of painty-handprints all over the blurb!
I'll get onto the International website.

Thanks.

For UNO the maximum immmersion times are: 5-15°C - 3 mths; 23°C - 2 mths; 35°C - 1 mth

For Uno EU 5-35°C 6 mths

 

[webcraft]

.
Can you reactivate old antifoul by wet-abrading it with a Scotchbrite pad, and if so can you then put another coat on top?

Reason I ask is, we antifouled Avy-J a6 months ago - 2 coats - then sailed her 16 miles and lifted her out. Relaunching beginning of May.

- W

Again, it depends on make of antifoul but, it may be OK with a surface abrade and no further coat.

It was Hempel's 'Cruising Performer' , which gives max. launch time after application as 6 months. If we can abrade it then recoat with one or two coats of some other self-eroding antifoul then we could get a couple of seasons out of it ? ?



- W

 

[Robert Wilson]

For UNO the maximum immmersion times are: 5-15°C - 3 mths; 23°C - 2 mths; 35°C - 1 mth

For Uno EU 5-35°C 6 mths

Thanks for that.
Just to check, do you mean for temperatures between 5°C and 15°C I can launch any time up to 3months after application?

Interestingly, those are the temperature ranges we've had already in the last four weeks!

On the plus side, from experience of these northern west-coast waters the fouling is not heavy so I normally get away with just one coat of A/F.
Last year I experimented by putting on a red first, then a blue just to sea how much came off in one season in the water.
As I mentioned above, almost none of the red was showing on lift out.:encouragement:

 

[BelleSerene]

Minimum time ? Frequently usually how long it takes for the tide to return after last brush stroke.
Only ever used budget soft A/F
Could be as little as an hour or two if things do not go to plan.

The OP is asking max time between paint and re-launch, not min time.

Max time has never been a worry for me either, as the tide is all mine gets.

 

[Robert Wilson]

Just spoken to International.
They confirm with the new re-formulated Cruiser 250 there is no time limit required between application and immersion.

(within climatic conditions e.g. extensive rain) ​

If the interval were to be something like a year they recommend a further coat before immersion.
Normal minimum times apply vis a vis ambient temperatures.

That's a relief, so I can a/f this/next week and re-launch in a month's time.

Thanks to you all for all your ideas and input - as usual.

R