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What is this hull bottom coated with?
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- Gold Member
- Posts: 16
- Joined: Tue Feb 06, 2007 10:55 am
- Home Port: Portland, ME
- Location: Cape Elizabeth, ME
What is this hull bottom coated with?
The bottom has blue bottom paint with a red coat underneath. What you see is after scraping all the loose paint off. What is the surface below the red paint ? Doesn't look like gelcoat or a barrier layer.
Tim
Tim
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- Gold Member
- Posts: 772
- Joined: Tue Feb 27, 2007 6:14 am
- Home Port: Oxford, MD
- Location: Preston, MD
Re: What is this hull bottom coated with?
It is common practice to paint bottom with a hard bottom paint of a different color. Then an ablative paint over that. When you start to see the different color it’s time for new paint. It looks like maybe the prep work for the blue was lacking, therefore poor results of adhesion?
28TE "Kozy L"
"How U Albin"
"How U Albin"
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- Gold Member
- Posts: 16
- Joined: Tue Feb 06, 2007 10:55 am
- Home Port: Portland, ME
- Location: Cape Elizabeth, ME
Re: What is this hull bottom coated with?
Thanks, but I'm not confused about the blue and red coats of paint. What I'm trying to figure out is what is the material where all the paint is gone. The area that looks tan/brown with black spots. It is not paint, it is hard and shiny and smooth. What I expected below the red coat was gelcoat or a barrier layer. That area sure doesn't look like gelcoat and I expected a barrier coat to look white or gray. I have never seen a bottom with a material that looked at that.
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- First Mate
- Posts: 43
- Joined: Mon Jan 09, 2017 10:17 pm
- Home Port: Mason Neck, VA
Re: What is this hull bottom coated with?
Hard to tell from the picture, but I have a black gelcoated hull and that's the appearance when scraped/sanded down to bare gelcoat. To my knowledge Albin did'nt barrier coat in the factory, unless a later owner would have done it.
- Norseman
- Gold Member
- Posts: 1710
- Joined: Mon Jul 13, 2015 10:58 am
- Home Port: Palm Coast, Florida
- Location: Marina del Palma
- Contact:
Re: What is this hull bottom coated with?
Had my bottom soda blasted down to bare gelcoat and it was white, or off-white.
2001 28TE, 6LP-STE, 1,337 hrs, 19X18 four-blade wheel.
- Tree
- Gold Member
- Posts: 1615
- Joined: Fri Mar 22, 2013 12:28 pm
- Home Port: Portsmouth, UK
- Location: Bordon, UK
- Contact:
Re: What is this hull bottom coated with?
Mine was green. Normally boats over here have clear gel below the water line as the pigment in gel can cause osmosis.
It looks like a barrier cost to me. There is a product here called VC tar or used to be that is the same colour.
Fisher Price 2
Hull Number AUL28489L900
Yanmar 6LP-STE
Built in Portsmouth RI, USA - Berthed in Portsmouth Hampshire, United Kingdom.
Hull Number AUL28489L900
Yanmar 6LP-STE
Built in Portsmouth RI, USA - Berthed in Portsmouth Hampshire, United Kingdom.
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- Gold Member
- Posts: 16
- Joined: Tue Feb 06, 2007 10:55 am
- Home Port: Portland, ME
- Location: Cape Elizabeth, ME
Re: What is this hull bottom coated with?
Thanks everyone,
Based on the replies, I'm thinking the black 'marks' are really the original black gelcoat. I couldn't find any images of VC tar, which was a one part epoxy primer, but International paints still sells VC Tar 2, a two part epoxy primer which looks brown/red. This is a 1995 black hull. Maybe the VC Tar coat is wearing thru (or was scraped off during bottom paint removal), leaving the black marks. I read that I can put an epoxy barrier over the VC Tar, so I'm thinking if I finished cleaning the bottom paint and sanded, I could start over with a new barrier layer and bottom paint.
Tim
Based on the replies, I'm thinking the black 'marks' are really the original black gelcoat. I couldn't find any images of VC tar, which was a one part epoxy primer, but International paints still sells VC Tar 2, a two part epoxy primer which looks brown/red. This is a 1995 black hull. Maybe the VC Tar coat is wearing thru (or was scraped off during bottom paint removal), leaving the black marks. I read that I can put an epoxy barrier over the VC Tar, so I'm thinking if I finished cleaning the bottom paint and sanded, I could start over with a new barrier layer and bottom paint.
Tim
- Norseman
- Gold Member
- Posts: 1710
- Joined: Mon Jul 13, 2015 10:58 am
- Home Port: Palm Coast, Florida
- Location: Marina del Palma
- Contact:
Re: What is this hull bottom coated with?
Will look for pics and post: After the most expensive yard in town stripped my boats bottom.. Mine was green.
Stay tuned.
2001 28TE, 6LP-STE, 1,337 hrs, 19X18 four-blade wheel.
- RobS
- Gold Member
- Posts: 4044
- Joined: Wed Oct 03, 2007 6:20 am
- Home Port: Center Moriches, NY
- Contact:
Re: What is this hull bottom coated with?
The hull is original factory black gelcoat? So why would you think the black underneath it all is anything but the gelcoat?
Rob S.
"TENACIOUS"
1974 Chris Craft 36' Commander Tournament
Cummins 6BTA 330B's
(Former Owner)
"TOY-RIFIC" 2000 28TE, 6LP, Hull 408
Luck is the residue of good design.
"TENACIOUS"
1974 Chris Craft 36' Commander Tournament
Cummins 6BTA 330B's
(Former Owner)
"TOY-RIFIC" 2000 28TE, 6LP, Hull 408
Luck is the residue of good design.
- Norseman
- Gold Member
- Posts: 1710
- Joined: Mon Jul 13, 2015 10:58 am
- Home Port: Palm Coast, Florida
- Location: Marina del Palma
- Contact:
Re: What is this hull bottom coated with?
This is my bottom after soda blasting.
(Boat’s bottom actually)
(Boat’s bottom actually)
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2001 28TE, 6LP-STE, 1,337 hrs, 19X18 four-blade wheel.
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- Gold Member
- Posts: 16
- Joined: Tue Feb 06, 2007 10:55 am
- Home Port: Portland, ME
- Location: Cape Elizabeth, ME
Re: What is this hull bottom coated with?
Black gelcoat is what I expected to see, but what I saw was a brownish surface with some black marks. Looks like it might have been brushed on. I thought the black marks might have been black gelcoat below the brownish surface. I have since been able to examine the boat again and found the brown areas with black marks feel smooth. There is no height change between the brownish surface and the black marks that I can feel. Maybe it's the VC Tar coating.
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- Deckhand
- Posts: 9
- Joined: Tue Mar 20, 2018 11:46 am
- Home Port: Chesapeake/ Potomac
Re: What is this hull bottom coated with?
Is it possibly a sand less primer that is applied to the gelcoat before bottom painting?