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Discussion Starter · #1 ·
I have just installed some butyl rubber from the rear of the car until just behind the front seats. It was a bit of a mission to make a clean job but I am happy with how it went. Tomorrow I will cut out some mass loaded vinyl to replace the underlay. However, the car has a lot of holes which would let In water in a river crossing. Some of them have bolts in them and some not. A couple seemed to be drilled and not tapped. Also where you see the yellow tape in the picture the are long oval holes which I don’t know why they are there.

Question: are some of the holes important? Can I just plug them somehow? I am thinking either rubber grommets and silicone or screws with as flat heads a possible.

Some of the holes got some serious bolts in them which makes making a flat surface harder. I am building a floor so I can put a storage solution in.
Any ideas would be appreciated.

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Discussion Starter · #4 ·
You might be better off leaving them open to let water drain out if your planning on doing some deep water crossings?
I would rather water or humidity not getting in in the first place. However if water did enter I would remove all interior to dry. This is one of the reasons I am installing mass loaded. Only instead of the stock underlay. It won’t hold water. Also dust is another problem.
 

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Discussion Starter · #8 ·
I ended up using grub screws and some blue thread lock for the holes that I didn’t use. The child seat restraint holes where imperial so I ended up using a rubber grommet some some tape. Same with those oval holes near the doors that had yellow tape over them. Carpet and MLV in installed and no obvious holes for water or dust to enter. Should be good in the end. Thanks
 
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