Bartamos, I'd think if you cut into it the sealer may be light grey, that was the color we used, If you get under it and peel it off you could see bear metal or primer, we put all the sealer in the seams before it went to the prime booth,as far as the number only the person who put it there knows, Yes I've seen fire walls, floor pans, inside of doors, but I worked at the plant for 30 years so thats a lot of vehicles and if you look under a hood now you don't see too much of the fire wall,as far as cleaning it up we were running at 45-48 vehicles an hour and they didn't like it if you stopped the line,when contractors would be in the plant working they where told if they stopped the line it was 1000.00 per minute fine so they had to be careful. Roger
