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Post by Jim on Feb 25, 2020 15:34:23 GMT
I know you want epoxy 2 pack, that's the way to go if you can. If you don't I've been very happy with Keelblack, now on its second blacking and doing fine.
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Post by peterboat on Feb 25, 2020 23:44:47 GMT
I had mine shot blasted and zingered I still use keelblack over it for cosmetic reasons, and to repair damage when traveling around
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Post by JohnV on Feb 26, 2020 7:24:17 GMT
I grit blasted and 2 packed (Interzone 954) best thing I ever did (apart from fitting a Daewoo engine)
that was about 13 years ago at my previous drydocking, almost 3 years ago when drydocking the epoxy was in very good condition over most of the boat. I then Keelblacked over the top which seems to be lasting.
Exactly how well won't show up until the next drydock of course.
Grit blasting and coating in 2 pack is definitely the RollsRoyce treatment if done properly.
(Interzone 954 is the paint the gritting firm used on power station outlets and was, and still is, bloody expensive)
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Post by naughtyfox on Feb 26, 2020 7:42:06 GMT
Last June we covered our previous 'bituminous coal tar' layer with SML Coating's silver-coloured paint that sticks to anything. It dries quickly. Then we used their 'Ballastic Black' which was nice and thick and 'creamy'. It is a bituminous coating. Our previous 'coal tar' coating was made by Spencer Coatings, Nottingham, now taken over by an American company who also bought out Rylard. Their woman representative finds answering questions irksome... Thunbs up, so far, for SML. Excellent customer service. www.smlmarinepaints.co.uk/home
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Post by Isambard Kingdom Brunel on Feb 26, 2020 9:02:19 GMT
sherwin-williams.com They are in Bolton, was Leigh's paints. They will advise you well.
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Post by JohnV on Feb 26, 2020 11:47:52 GMT
A bit ago I was watching a program about the Forth Bridge and they were talking about a new paint that they had started using that is meant to last much longer than coatings used before. It was an epoxy that contained flakes of glass and was supposed to be much better lasting and harder wearing and supposedly had been used successfully in the offshore industry. This morning I was searching t'internet for some details about a pump (without a lot of success) and decided to do a bit of reading after seeing this post this morning. What I have been reading is very interesting and I note that Jotun do a version (Jotamastic 90 GF) and the technical data sheet makes interesting reading www.paints4trade.com/ekmps/shops/tpukltd/resources/Other/jotun-jotamastic-90-gf-tds.pdf
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jimmy
Junior Member
Posts: 20
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Post by jimmy on Mar 4, 2020 20:07:25 GMT
Hi I had the same problem recently my boat was covered in comastic also. I have used Rytex on mine two coats of standard rytex then one coat of rytex premium on top (it resists diesel better than standard) went on easy and a nice finnish
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Post by quaysider on Mar 4, 2020 20:27:43 GMT
I've just booked Ellis in for Dry dock at the end of this season (the current blacking went on in Aug 2018 and is not very good)....
I can't afford to sand blast and 2 pack so it's either traditional or Keelblack - I can't remember who on here has used the latter product but I am tempted to give it a go - especially as it'll be 3 coats on in one day and then 3 days curing in the dry dock ... in early Nov
Thoughts?
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stevec
Junior Member
Posts: 12
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Post by stevec on Mar 4, 2020 22:02:40 GMT
sherwin-williams.com They are in Bolton, was Leigh's paints. They will advise you well. I concur with IKB, Their vinyl paint called Resistex is very good. It won't adjere ontop of bitumen - I used an old wood chisel to scrape my boat off - then wire wheeled and put two priming coats and two top coats. The hull originally had fairly laarge patches of electrolytic action (big orange patches with shiny metal underneath)
After this, with two years cruising there were only small patches where the resistex had not stuck well - residue of bitumen - After that for 15 years the hull is still as good as when I first used Resistex. (Drydock about every 2 to 3 years for another coat and check on wear and tear) - surveyor was impressed considering the boats age. Another advantage is it dries very very quickly. You can paint second coat with asecond man following about 8 to 10 feet behind - and when you step away you can start filling the drydock right away
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Mar 4, 2020 22:11:44 GMT
I've just booked Ellis in for Dry dock at the end of this season (the current blacking went on in Aug 2018 and is not very good).... I can't afford to sand blast and 2 pack so it's either traditional or Keelblack - I can't remember who on here has used the latter product but I am tempted to give it a go - especially as it'll be 3 coats on in one day and then 3 days curing in the dry dock ... in early Nov Thoughts? 3 coats in one day will just flake off and result in a need for re docking very quickly. You need to let it cure overnight.
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Post by quaysider on Mar 5, 2020 7:32:46 GMT
It's implied once you get round the boat with a thin coat, it's ok to begin the next one - the longer "finished" curing before going back in the water the better... I've booked in for days so once I've jet washed and scraped the first day, I was hoping to get (assuming I DO go down the keelblack route) 2 coats on before bed - it being ok to apply to damp hulls . It can't be any worse that the current stuff that didn't even make it to 1 year before the orange spots began appearing.
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Post by JohnV on Mar 5, 2020 8:16:19 GMT
I've just booked Ellis in for Dry dock at the end of this season (the current blacking went on in Aug 2018 and is not very good).... I can't afford to sand blast and 2 pack so it's either traditional or Keelblack - I can't remember who on here has used the latter product but I am tempted to give it a go - especially as it'll be 3 coats on in one day and then 3 days curing in the dry dock ... in early Nov Thoughts? 3 coats in one day will just flake off and result in a need for re docking very quickly. You need to let it cure overnight. Not with Keelblack ........ you can tell when it's ready for re-coat, it goes gloss (matte when fresh) and that is very very quick. It's not like any other coating. It also goes on very quick, it's almost like painting water. On Sabina by the time you had finished the first coat the first part was already glossy. A quick cup of tea and off you go again.
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Post by Jim on Mar 5, 2020 13:17:10 GMT
3 coats in one day will just flake off and result in a need for re docking very quickly. You need to let it cure overnight. Not with Keelblack ........ you can tell when it's ready for re-coat, it goes gloss (matte when fresh) and that is very very quick. It's not like any other coating. It also goes on very quick, it's almost like painting water. On Sabina by the time you had finished the first coat the first part was already glossy. A quick cup of tea and off you go again. Having now used keelblack twice I agree. Although I did it in May. Keelblack recommend a coat of fertan rust killer, that needs to be left overnight, wash off and start with the keelblack. As for stripping off old bitumen, it must be a long process with an old chisel. I got a rotoblaster, rubber wheel with carbide tips, stripes paint and leaves metal clean. Did that the first time. Last time I just borrowed the petrol jet wash with rotating tip from Bronte Boats, that cleaned off everything nicely before fertan and keelblack.
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Mar 5, 2020 13:27:24 GMT
Not with Keelblack ........ you can tell when it's ready for re-coat, it goes gloss (matte when fresh) and that is very very quick. It's not like any other coating. It also goes on very quick, it's almost like painting water. On Sabina by the time you had finished the first coat the first part was already glossy. A quick cup of tea and off you go again. Having now used keelblack twice I agree. Although I did it in May. Keelblack recommend a coat of fertan rust killer, that needs to be left overnight, wash off and start with the keelblack. As for stripping off old bitumen, it must be a long process with an old chisel. I got a rotoblaster, rubber wheel with carbide tips, stripes paint and leaves metal clean. Did that the first time. Last time I just borrowed the petrol jet wash with rotating tip from Bronte Boats, that cleaned off everything nicely before fertan and keelblack. I tried that fertan, bought a gallon of it from the maker. The blacking came off after about 12 months. I'm not sure if it was my fault or the product. Anyway, the next time, I used red oxide which seems to have behaved better. I've now got 60 quid worth of fertan stored under the bed. Suppose I'd better look at the shelf life.
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Post by JohnV on Mar 5, 2020 13:56:25 GMT
must admit, I'm no fan of Fertan.
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