Seam sealer recommendations

[Paladin]

A while back I posted a thread about some leaks in the seams of the bus. Since then and with the snow melted I've been able to discover some more about the beast.

I do have a drip rail, the rivets and seams do have sealer bit I'm still getting some leaks. Does anyone have any recommendations for a sealer that I can run a bead along the inside in the areas that leak? The real issues are where  the caps were installed and a couple places along the upper sides. Keep in mind that this will never be visible with the ceiling in so cosmetics aren't a real issue, durability is though. I only want to fix this once hopefully.

Some have suggested I just run some roofing tar material along there? There's gotta be a better although not real expensive alternative. What's the hot product for this?

[Lin]

Sykaflex seems to be the Captain America of caulk.  It is amazingly adhesive and tough.  I would not recommend using it on joints that may have to be separated though.  Not really knowing the product, I used it initially as if it were silicone.  When it dried, I realized that disassembling it would be a nuisance.

[skipn]

Paladin

  Try this link a lot of products mentioned.

www.busconversions.com/bbs/index.php?topic=7379.0

Skip

[chazwood]

Just a thought.....every leak I found on my mc-9 was in the running lights. Sometimes the water would run the whole length of the bus frame before it dripped down. Hard to trace....until I gutted it.

[Stan]

The general thought is that you cannot effectively stop a leak from the inside. By sealing the seam on the inside, the water remains trapped in the joint, putting pressure on your patch and corroding the rivets.

[Damn Yankee]

I used this stuff extensivly while building my conversion and it works great..
http://www.bestmaterials.com/m1-structural-sealant-1090.html
Its also an excellent adhesive. Not a bad price at this website. I pay about $8.00 a tube at my local roofing supply. Never seen it at HD or lowes.

[JimC]

I have used gutter seal with good results, you can find it at the major home centers. I used it to seal floors of cars after patching, metal roof repairs of sheds, and of course gutters.
It can be bought in large caulking tubes, and is cheap compared to other similar products. But like the other post stated, it will be hard to do it from inside.
Jim