Rivets

[Bonzo]

Here you go David

Here's a little Avdel info on a sealed rivet

How a sealed rivet worksl

A sealed rivet has an enclosed end as oposed to a blind rivet that is open ended.

Personally, if you have used blind rivets in your floor I wouldn't eat myself up about it.
After all, once the chassis is the right way up, how much water can leak in !!??