Rear shroud sealer

[Superwrench]

Getting ready to put the rear shroud back on my chassis. What sealer did you guys use around edges to keep out water and stop the corrosion between the steel and aluminum ? thanks, Quick

 

[Randy Forbes]

If the panels are coated inside & out with a good primer (like DP40/401) and then painted with a catalized acrylic enamel, I don't think there's much to worry about with electrolysis.

The rear shroud wraps over the chassis flanges (except at bottom rear) so you don't really need a seam sealer until the fenders are attached (and even then, it will be a pain to deal with the beads/sealer at once).

For all the BMWs, I use a brush-on seam sealer I get from Eastwood. 3M has a similar product, but it's stiffer and doesn't flow on so well__you could probably thin it with solvent, but I just keep buying the Eastwood stuff.

I think if you used a butyl-rubber type strip-caulk, you'd risk really damaging the shrouds if they ever had to be removed (collision repair, etc.). Though it would lend itself to "packing the seams" after final assembly/adjustment, etc.

 

[Superwrench]

Thanks Randy, Guess that is right. Shroud was epoxy primed and painted and chassis was powder coated. I will probably be dead and gone until any corrosion would start. Quick

 

[andrea]

https://www.ahead4healeys.co.uk/ANTI-CORROSION-JOINT-STRIP-id4136.html
here you can find the protective corrosion joint strips
on the rear the strip must be positioned on the upper part of the frame with one part that cover the side of the interior rear fender
one other strip can be positioned at the joint of rear shroud
and rear external fender
If you send me your e mail I can send you my design
Cheers
Andrea