And what materials and procedures do you like for sealing seams, both inside lap joints and closing up panel joints in corners and elsewhere?

Wurth sprayable seam sealer. Use their spray gun (or other brand equivalent) to get factory sprayed look.

Here is the stuff you want. I have a few cans left over from my build if you are interested. PM me and let me know.

Click to view attachment

@Cairo94507 Michael, if @bkrantz doesn't want your left over Wurth, I'll purchase it.
Sorry for the hijack...
Chris

That is great for undercoating but I think OP was looking for actual seam sealer to be used after weld repairs.

Sprayable Seam Sealer is p/n 0890 092 29 (for beige).

Here is the YouTube on the product and applicator for seam sealer to match OEM.


https://www.youtube.com/watch?v=Hb7NLnl0QJM

A lot of the seam sealer was brushed on at the factory. For those seams, I used Evercoat Brushable Seam Sealer. There are probably better options but it went on well and matched factory appearance after paint.

we use the brushed on and the wurth sks (in the wurth gun as previously mentioned) to duplicate the original stippled look at the rear wheel wells and the front and rear panels.

For seam sealer I used bed liner in a shutz gun to get this.. I used Monstaliner , upol/ raptor, and herculiner.. Monstaliners are by far the best product hands down.. Click to view attachment

OK. Going to Chris. Thanks everyone. Michael

Thanks, everyone. I am indeed looking for stuff to cover welds and seams. I do see the factory used both spray on and brush on, but 100% original is not as important to me as effective and long lasting.

We used the SEM, both brushed and sprayed with their SEM gum.
It worked pretty well and looks good and a lot more cost effective than the wurth. From a gun and material POV.
I can send pictures of it painted tomorrow if you want to see it

Thanks. I would indeed appreciate more info.

I will do my best to post pics of the car, the spray gun and the cartridges tomorrow.
I'm heading to Dallas for business this week so it might be a little tight but, I'll do my best.

Thanks!

+however many on the Wurth gun, super close to factory look (that I was looking for)

I have a question about these seam sealers.
Are they better at actually sealing than the factory?
I have been scraping off the old stuff and everywhere there is seam sealer I find rust underneath. A good example if this is the area in the rear fenders just above the door dimple.
It makes me want to brush on just enough to cover the seam itself rather than spray a wide swath—to avoid more areas that can trap the water. I am not concerned about it looking original as the car is going to be a converted six.

Thank you

-Andrew

I've wondered this myself..




.

@bkrantz - I made it back from Dallas so, I'll fill you in here on the SEM.

You can buy the gun here: https://www.amazon.com/SEM-29442-Seam-Seale...r/dp/B01MQH4H6O

I got the cartridges from my local paint shop but, I'm sure you can get them off of Amazon as well.

As far as factory look goes, we got close. We played with it for a long while, more air, less air, closer to the metal, further away from the metal, etc... until we found a combination that we liked. It's not perfect but, its good. Had we tested more, there's no doubt in my mind that we could have duplicated it almost exactly.

Here's some pictures for you, after the car was painted.

That looks good.

Thanks @Cairo94507
The trick now it to not garf things up while we're putting it back together.

Thanks. That looks great--certainly good enough for me.