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Bluest

Member Since: 23 Apr 2016
Location: Lancashire
Posts: 3997

2007 Defender 110 Puma 2.4 XS CSW Java Black

Rear door - corrosion in bottom seam

I’ve got corrosion on the bottom inside of the rear/safari door in my Puma. It is on the joint where the door skin is wrapped over along the bottom edge and I think it is from water that gets trapped there by the rubber seal when the door is shut. I understand it’s quite common and I’ve noted it for far too long. Has anyone got any ideas for successfully repairing and preventing it? With it being in a seam and in contact with door seal I can’t think of a way to repair it that will last and look satisfactory. 2007 110 TDCi Station Wagon XS

5th Mar 2023 10:56am

TexasRover

Member Since: 24 Nov 2022
Location: Paris
Posts: 792

2002 Defender 110 Td5 DCPU Chawton White

Clean it and then apply Fluid Film all over, all over the car in fact, reapply regularly

In my experience you cannot stop the rot with paint, you have to look at a removing dirt and then stabilise.

5th Mar 2023 11:44am

Balvaig

Member Since: 19 Feb 2016
Location: Fife
Posts: 719

2016 Defender 90 Puma 2.2 Landmark LE Corris Grey

My 2011 Puma went in the same place.
Try repainting and then covering with a thin strip of helicopter tape along the seam. This will prevent rubbing on the seal, and as it is clear you can keep an eye on any future corrosion.
Check that the drainage holes are clear too.

5th Mar 2023 1:41pm

Bluest

Member Since: 23 Apr 2016
Location: Lancashire
Posts: 3997

It already got a bit flaky so more that just a repaint or treating is required I fear. I was tempted to abrade away as much rust as I could, apply rust converter, then seam seal for a smooth finish before repainting, but concerned ant remaining rot might fester under the seam sealer for bigger trouble down the line. 2007 110 TDCi Station Wagon XS

5th Mar 2023 9:04pm

Retroanaconda

Member Since: 04 Jan 2012
Location: Scotland
Posts: 2547

Once the rust is in the seam you’ll never stop it I’m afraid. You might be able to slow down the spread a bit but it will travel between the panels and there’s no way to get effective treatment in there.

5th Mar 2023 10:16pm

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