Cracks in anti-fouling- Altex (Black)

[coopec]

My yacht is under construction.

Around this time last year I gave the hull a barrier coat as well as Altex anti-fouling (black)

I looked at the anti-fouling today on the keel and I can see hairline cracks in the anti-fouling (let's hope it is not in the barrier coat as well) I have yet to investigate it fully but I notice it is only on the western side of the keel which gets the sun.

Could the hot Summer sun have caused the hairline cracks? My B-I-L says anti-fouling is not meant to be in the sun for long periods and that would be the cause of the hairline cracks (let's hope so)

Can anyone advise if hot Summer sun could cause the hairline cracks? Thanks

 

[Spirit (of Glenans)]

Why are you anti-fouling a boat that is under construction and thus, presumably, will not be in the water for some time?

 

[Rappey]

There is a maximum out the water time for most antifoulings and would guess you've gone well beyond that time!

 

[Momac]

There is a maximum out the water time for most antifoulings and would guess you've gone well beyond that time!

Not necessarily .
The OP mentions a manufacturer but not the exact product. With some antifouling the time from application to launch is not critical.


However it would seem in this case the sun has to over a year .

 

[Rappey]

With some antifouling the time from application to launch is not critical.

thats why i said "most" rather than all

 

[peter gibbs]

My yacht is under construction.

Around this time last year I gave the hull a barrier coat as well as Altex anti-fouling (black)

I looked at the anti-fouling today on the keel and I can see hairline cracks in the anti-fouling (let's hope it is not in the barrier coat as well) I have yet to investigate it fully but I notice it is only on the western side of the keel which gets the sun.

Could the hot Summer sun have caused the hairline cracks? My B-I-L says anti-fouling is not meant to be in the sun for long periods and that would be the cause of the hairline cracks (let's hope so)

Can anyone advise if hot Summer sun could cause the hairline cracks? Thanks

If your a/f is of the abating variety as opposed to copper, by its construction it remains in a condition under water where micro layers are lost. This feature is not suited to prolonged exposure to air . It will say so on the tin unless written in Greek or Turkish.

PWG

 

[coopec]

Why are you anti-fouling a boat that is under construction and thus, presumably, will not be in the water for some time?

The first coat of anti-fouling has to be applied to the barrier coat before it has cured ie you can dent it with your finger-nail. (Must be a chemical bond)

 

[coopec]

There is a maximum out the water time for most antifoulings and would guess you've gone well beyond that time!

You guessed wrong! A lot has happened with anti-foulings in recent years. I think you'll find the past ablative anti-fouling is history and banned (or about to be) in some countries.

What happens when they ban antifoul?

5 reasons why you need to ditch the antifoul or bottom paint

This development looks interesting? (Drawing copper from sea-water?)

Australian researchers pioneer anti-fouling coating process

 

[coopec]

If your a/f is of the abating variety as opposed to copper, by its construction it remains in a condition under water where micro layers are lost. This feature is not suited to prolonged exposure to air . It will say so on the tin unless written in Greek or Turkish.

PWG

Thanks for that but my anti fouling is not ablative (?) (I think they call it multi-season? Altex No 5 anti foul;ing).

Altex No.5 Antifouling is recommended: Where multi-season effective fouling protection is needed Where regulations ban or restrict the use of organoti

Maybe I'll have to anti-foul it before I normally would have to. ( But I don't think I had any alternative to what I have done)

 

[Deleted member 36384]

Maybe the design of antifouling is just not up to it the environment it's been exposed to, or you have misapplied the antifouling, coating thickness wrong. It could be so many things. I would contact the product developers and ask them.

 

[Momac]

Turn the boat around and if the other side hairline cracks after another summer in the sun you will know the sun has caused the cracking .
It doesn't sound like a big issue

 

[coopec]

Maybe the design of antifouling is just not up to it the environment it's been exposed to, or you have misapplied the antifouling, coating thickness wrong. It could be so many things. I would contact the product developers and ask them.

I'm hoping "Maybe the design of anti-fouling is just not up to it the environment it's been exposed to" is the answer.

The fact that it only has hairline cracks on the side of the yacht that gets sun may be the clue?

Thanks for your thoughts.

 

[coopec]

Turn the boat around and if the other side hairline cracks after another summer in the sun you will know the sun has caused the cracking .
It doesn't sound like a big issue

Mmmmmn! it's 43ft yacht (It took me almost a day to jack the whole yacht up about 6 inches and re-chock it)

"It doesn't sound like a big issue" I like it!!??

Thanks

 

[Momac]

Mmmmmn! it's 43ft yacht (It took me almost a day to jack the whole yacht up about 6 inches and re-chock it)

I am assuming there is a crane or hoist available.

 

[coopec]

I am assuming there is a crane or hoist available.

No Marty no cranes anywhere close.

When they come to transport it they use a purpose built "U" shaped trailer and jack up the yacht before driving off.

 

[PaulRainbow]

Thanks for that but my anti fouling is not ablative (?)

Might want to re-read the data sheet.

 

[pvb]

I am assuming there is a crane or hoist available.

The boat's in his garden...

 

[coopec]

Maybe I've got nothing to worry about.

 

[PaulRainbow]

Maybe I've got nothing to worry about.

Do Australian gardens suffer from a lot of marine growth ?

 

[coopec]

Why are you anti-fouling a boat that is under construction and thus, presumably, will not be in the water for some time?