2 pack done OVER bitumen - advice needed

[Abi Trainor]

A boat I've just had surveyed has had the two pack epoxy put on badly over the previous blacking rather than having had the blacking removed. 

What are my options? Do I need to just strip the whole lot back to metal and reblack?

 

This is my first boat. Other than that it's in good condition. 

[Tonka]

Don't Ballistic Black do an epoxy which you can put over bitumen.  Perhaps this is what it was painted with

[Mike Tee]

Your first option is to get a significant price reduction due to the expensive problem you will inherit if you go ahead with the purchase.

[Alan de Enfield]

6 minutes ago, Mike Tee said:

Your first option is to get a significant price reduction due to the expensive problem you will inherit if you go ahead with the purchase.

 

Or the owner can say he has "already priced in the need for reblacking - take it or leave it"

[Arthur Marshall]

Mine was 2 packed over bitumen with no problems. Just been 2 packed again.

[Mike Tee]

^^^ That's fine, it worked for you, but the original op said, and I have to assume was told this by his surveyor, that 'the two pack epoxy was put on badly' - so in this case there is a problem. In the opinion of the surveyor.

[ditchcrawler]

I have had mine done twice. It is not the same job or price as grit blast and 2 Pk so I don't expect it to last 20 years, but it doesn't dissolve when you get a bit of diesel floating around . I will have it done again in a few years if I am still able.

IMO what the OP has is better than bitumen and if he wants to he could just recoat with bitumen and it would be no worse than if the 2Pk was never put on.

[BEngo]

If it is badly adhering then you will only get a satisfactory result if all the coatings are removed and renewed.  The best way to do this is to shotblast to SA  2 1/2. 

 

Some have had apparent success with the Tercoo blastet but there is npt much evidence (either way) for long term performance.

 

N

[TheBiscuits]

2 hours ago, ditchcrawler said:

IMO what the OP has is better than bitumen and if he wants to he could just recoat with bitumen and it would be no worse than if the 2Pk was never put on.

 

That's far too sensible for here Brian!  You'll need to hand in your CWDF membership card 😁

[Abi Trainor]

Thank you all so much! The marina is going to have a look at it tomorrow to see how bad it is and then I'll decide. You're all stars. 

[LadyG]

18 hours ago, Mike Tee said:

^^^ That's fine, it worked for you, but the original op said, and I have to assume was told this by his surveyor, that 'the two pack epoxy was put on badly' - so in this case there is a problem. In the opinion of the surveyor.

I dont know how he knows it was put on badly, I would translate that very informal and not helpfull description as follows:

 

" the epoxy should not have been put directly on top of  bitumen blacking as they are normally not compatible.

The epoxy has not formed a good coating as the hull has not been prepared according to the epoxy manufacturers instructions."

 

You have paid a professional  has he given you a very wooly report, expecting you to know something about hull preparation and hull coatings.

I'm assuming the OP commissioned and paid for the survey.

Its not clear if this was a casual remark made by the surveyor to some random passer - by, which is unlikely, as surveyors are paid to report to their clients.

OP should go back to the surveyor and ask what to do for best. He will likely say that the boat should be taken back to bare metal, then rust treated, then two pack epoxied as per the data sheet.

To do this requires the owner to have the boat hauled out for two weeks, a strong power wash and scraping followed by  quite a lot of prep with power tools. It's quite difficult to make perfect preparation on a second hand boat.

The boat is probably currently back in the water, and assuming the surveyor coated any hull scrapes he made it will probably be OK for a while, if there are rust patches etc then it needs to come out and the sooner the better.

 

18 hours ago, BEngo said:

If it is badly adhering then you will only get a satisfactory result if all the coatings are removed and renewed.  The best way to do this is to shotblast to SA  2 1/2. 

 

Some have had apparent success with the Tercoo blastet but there is npt much evidence (either way) for long term performance.

 

N

Just to add, this poster is a professional with plenty of experience,  so OP can take this as best advice.

Edited July 17, 2024 by LadyG