Coppercoat intrigue

[Graham_Wright]

Discuss!

 

[AntarcticPilot]

Looks like it got wet before the resin had finished setting.

 

[James_Calvert]

Just a guess, but does your keel sit a bit in the mud at low tide?

 

[Graham_Wright]

Clue - I was painting only the keel.

Boat is ashore hanging in slings.

 

[VicS]

Clue - I was painting only the keel.
Boat is ashore hanging in slings.

Discuss!

Too cold. or dewpoint too high ............ Condensation occurred as a result ( over the encapsulated ballast ???) before the paint/ coating dried / cured.

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[AntarcticPilot]

I was speaking from experience - when I applied mine, it rained on the third day after application, and I had to redo the areas where the resin hadn't fully cured.

 

[neilf39]

Probably damp. I Gelshielded my boat and it rained on the last layer which has now mostly come off. I think if epoxy gets damp or is applied to a damp surface it basically doesn't bond.

 

[Spirit (of Glenans)]

When preparing my my previous boat for sale, one last job before the first buyer arrived, was to paint the last two treadmaster panels, on the coachroof, with the special Treadmaster paint. I was a little too optimistic about the forecast showers and did not realise the implications of using water based paint in this scenario. The result; a blue flood over most of the deck

 

[Andrew_Trayfoot]

I have the same problem..

If the underlying metal is not perfect then it can happen. If the boat is old and the keel is not encapsulated then you will have pitting that may be almost invisible.

Spoke to Aquiraus Marine and options are:

1. Live with it.
2. Start again, but you may get the same problem however good your prep..
3. Use conventional antifouling on the keels.

I am currently on option 1...

 

[Daydream believer]

I had similar problem there were streaks in the coppercoat the following day. Manufacturer said it was due to condensation. I had to re do the entire boat again
Next application was good & there was no problem with the cast iron keel. Adhesion of the first coat is still OK except for small areas of impact over the years

 

[sailaboutvic]

Look to me it's the first coat ?
Ok joking , if you going to go it again consider putting on a few coat of epoxy first .

 

[Graham_Wright]

Failed!
The white paint is Hempel light primer applied a week previously.
Due to losing the battle over hoist availability (I am the new boy), I missed the best weather the previous day and applied late the following afternoon.
Due to the falling temperatures, successive coats were applied later and later.
That night, there was torrential rain.
Water off the deck misses the keels (something I was relying on).
What everyone has missed is that the Coppercoat ran upwards!
That, I believe, was due to splashes upwards from the surrounding puddles.
If the boat had been lifted higher, they would have missed.
It would also have been much more comfortable working at waist height.
Repeat application this weekend.
It's only money.

 

[sailaboutvic]

Graham we done two boats and both time we put plastic all around from below the toe rail , if you just doing the keel you could use prop around the keel and use the prop to keep the plastic from touching the keel .

 

[Graham_Wright]

Graham we done two boats and both time we put plastic all around from below the toe rail , if you just doing the keel you could use prop around the keel and use the prop to keep the plastic from touching the keel .

Would have made no difference! The water splashed upwards!
The keels stay dry from rain above.
We had the luxury of applying the Coppercoat over everything in the dry save for where the keels rested in the trolley channel.
Following Coppercoat's recommendation, I had ready some wall damp proofing course to tape above the area to BE finished but it wasn't necessary (and would have achieved nothing!).