I ripped out the interior, and I see this black rolled on asphalt stuff that's on most of the weld joint areas. Some of it is coming off, and so I'm wondering if it's ok to take the rest of it off. I'm going to be coating the car with a liquid sound deadener, so it will be sealed. I'd rather take the black stuff off now instead of having it come off later and taking my deadener with it. Opinions?

 

any pictures of this stuff?

 

Sure, why not. Same picture I used for another post in the fab forum, but this works and shows you what I'm talking about. You can see the silver area with black areas. The silver is where the black stuff has fallen off, and where the factory "welds" are.

 

It is a lot of work, but it comes off. It helps seal the seam from mosture; so removing it may open it up to future rust starting point, if you do not get it totally sealed with the liquid sound deadener

 

Just my two cents.....but I am rather fond of POR 15

 

Remove it, its crap and breaks down over time, If you take it off you will probably find places where rust is starting. Now is the time to fix it and cover it with a good undercoating.

 

my father was too after he sand blasted the frame on his 36 buick 4 years ago and painted it....4 years later, frame is still not in use, kept in a clean dry garage and the por15 is showing rust

 

really??? Damn! I'd beter do some reevaluating!!!

 

i can take a picture if you'd like....all their direction were followed...my dad is pissed to say the least. the frame is rather big and it took a while to sandblast. then the money and time spent on the por15

 

Yes, perhaps a picture or two would be helpful. If we see what results perhaps we can all make some good decisions on what to do. I know this is super_kev's topic, but perhaps it can help us all out when it comes to this

 

i took off that factory sealer on the welds and re-sealed it with seam sealer, it comes in a caulking tube so you can use a caulking gun, ive used 2 tubes now sealing everything it drys hard and its paintable after 2 hours, its still flexible so it wont crack or peel off. it kinda feels like polyurethane bushings, really hard rubber. i pay about 8 dollars CAD per tube so im sure it will be cheaper for guys in the US.