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obud View Drop Down
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    Posted: 29 Apr 2011 at 10:05am

I am repainting my sailboats bottom.  The keel(iron) is in need of some rust treatment since the seam where the keel meets the hull has some rust.   I did chip away some of the gelcoat where it was loose to expose more metal.  I plan to grind it to clean metal and coat with epoxy then interprotect.  My question is what is the best way to fill the seam and also protect the metal from future rust and have a solid surface for the epoxy to bond to? 

Thanks for any ideas.
 
Obud
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Jay@Interlux View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jay@Interlux Quote  Post ReplyReply Direct Link To This Post Posted: 29 Apr 2011 at 12:45pm

Hi Obud,

The typical system which we would recommend that you follow for a situation which is similar to yours would be:

1. Remove all grease and other contaminants by wiping the surface with Interlux® Special Thinner 216 or Fiberglass Solvent Wash 202.

2. Bring metal to a uniform bright finish by sandblasting or by sanding using a 36-grit sanding disc. All rust and other oxidation must be removed. Metal must be clean and bright with no residue remaining on the surface.

3. Remove all blast or sanding residue by using an air hose and broom or vacuum. Begin applying coatings as soon as possible.

4. Within one hour of sanding/grinding/blasting apply one coat of InterProtect 2000E which has been thinned 15% with Reducing Solvent 2316N, directly to the bare metal.

5. After 6 hours, apply either Interfill 830 or Watertite filler as needed to fair in the repair area allowing a minimum of 6 hours for curing.

6. Sand fairing compound with 80 grit sandpaper as needed to smooth the surface and remove sanding residue.

7. Apply an additional 3 coats of InterProtect 2000E following all overcoating times

8. Apply 2-3 coats of your antifouling paint following all overcoating times

 
Hope this helps.
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obud View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote obud Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2011 at 9:11am

Jay,

Thanks for the tips Jay.
 
I noticed you did not recommend Viny-Lux as a base coat but chose the 2000 instead.    Are they both similar in result?
 
Also how will the 2316 effect drying time of the 2000?
 
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Jay@Interlux View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jay@Interlux Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2011 at 3:56pm
Hi Obud,
Well the Viny-lux Primewash was a great product to start any metal system off with. Unfortunately however this product had to be discontinued and removed from our product range due to a corporate requirement from our parent company (Akzo Nobel). Based off a new standard which Akzo has put into place, we unfortunately are no longer able to produce chromate based products. The application of InterProtect directly to the bare aluminum was only an option but now with the lack of the Viny-lux Primewash, applying InterProtect directly would be the best option for you to go. The 2316N will cause the 2000E to kick off a slight bit quicker, but not too much. Hope this helps some more.
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