Preparing Pinchweld for Windshield Replacement
Putting these thoughts in my own thread for continuity because this is one of my (not critical but) annoying issues right now.
I did my best to repair the rusted sections:
(1) Stripped down to bare metal,
(2) Applied rust converter - Permatex,
(3) Primed
(4) Painted (spray can)
However, windshield still leaked during heavy rain. Safelite re-installed glass under warranty, but last week it leaked again. Same place - upper right-hand corner.
Shop will repair under warranty but that would be waste of time, money, and other resources. So I'm approaching mine more thoroughly.
Potential points of failure are:
(1) Between glass and urethane adhesive (beyond my control).
(2) Between urethane adhesive and paint,
(3) Between paint and primer,
(4) Between primer and rust-converter/protectant
(5) Between rust converter and metal.
Therefore, I want to try as less number of layers (or points of failure) as possible that would still:
(1) Protect from rust, AND
(2) Allow good adhesion.
Thoughts I have, that I hope bodywork experts in this forum can comment on, and I also wanna ask urethane windshield adhesive manufacturer (
SIKA?) are:
(1) Is POR-15 rust
protectant also rust a converter?
(2) Would POR-15 directly on metal be good?
(3) Is POR-15 as good as primer so I can simply paint directly on it, eliminating the primer layer?
(4) Some people online say POR-15 is compatible with the urethane adhesive. If so, then why not simply apply adhesive directly on POR-15 and mount glass, eliminating primer and paint layers?
IF anyone knows exactly the proper procedure, that will prevent rust and allow good adhesion, May we know what process you used?