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Old 02 November 2012, 15:24   #1
tanimola's Avatar
Country: UK - England
Town: Shropshire
Boat name: Tanimola
Make: Brig F400S
Engine: Evinrude E-Tec 40HP
Join Date: Sep 2012
Posts: 47
Repairing a repair???

Looking at a previous repair (inherited!) I have discovered a leak - tiny but still a leak

The rest of the repair seems sound.

Is it worth trying to repair the repair of better off to start from scratch?

Assuming starting from scratch, what is the best way to remove the current patch?

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Old 02 November 2012, 16:00   #2
Mextli's Avatar
Country: Germany
Town: Nuremberg
Boat name: November
Make: Avon Searider 4M
Length: 4m +
Engine: Yam 55
MMSI: 211748930
Join Date: Aug 2012
Posts: 313
Remove the patch. Its better than patching a patch.

I use hot air on hypalon with very good results

Searider+Yamaha+Land Rover= :D :D
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Old 02 November 2012, 17:06   #3
Peter_C's Avatar
Country: USA
Boat name: Uh...a kayak?
Length: 4m +
Join Date: Dec 2009
Posts: 1,605
A heat gun carefully used to soften the glue should allow it to pull right off. Heat slowly taking a few minutes to soften the glue. Once the patch is removed, MEK will soften the glue and allow it to be removed. I have found that course Scuffy Pad works excellent for removing glue without removing material. The pores in it collect the glue. I cut it into small pieces and toss them often. Having a little container filled with MEK allows the pads to be dipped. Good gloves are important!! Gluing is pretty straight forward. Follow the manufacturers recommendations.
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Old 03 November 2012, 17:29   #4
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
You may want to try heating and reburnishing the old patch first. Heat may reactivate the glue to the point where it seals, especially for a small leak.

Use something like the edge of a plate or similar to get good pressure, deflate the tube so you can back it with something sold (usually the hull will do, else wedge a piece of lumber behind), and go over the entire surface of the patch.

If it doesn't seal, then remove, prep and repatch.

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Old 23 November 2012, 09:55   #5
Country: UK - England
Length: no boat
Join Date: Nov 2012
Posts: 21
Hi ,you should never try to repair a repair it just doesn't work.Brig boats are usually PVC material so if you are going to use a heat gun do so VERY carefully as you can easily melt the fabric.Then cut a larger patch than the origional the patch should be a minimum of 1 inch larger in diameter than the damage in all directions and a minimum of 2 inches diameter .
If you are unsure consult a proffesional as it may save you money and grief in the future.
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