Hot Rods Instaling Dash

I have a 1940 Chevy that I removed the dash to do the wood grain. When removing it I noticed a black like caulking or adhesive. I'm sure the dash had never been removed. I am putting it back together and I feel that there should be something that goes between the dash and the body. The windshield sits right on it because I had to remove the glass to take out the dash but I am unsure on what to use. I'm thinking it may leak water if the water runs down the windshield if I do not put anything.. Any suggestions would be greatly appreciated. Thanks in advance

 

3rd paragraph in right column under Fig 5 - Body bolt locations.

Black mastic in other words. I had it in my 46 Olds as would most others. Manufacturers used it for anti-squeak and rattle, and to seal or waterproof panels coming in contact with each other at seams etc. Bookmark the shop and Fisher body manuals for future use. They come in handy. See if you locate an original on that web site as they crop up all the time.
http://chevy.oldcarmanualproject.com/shop/1941/41csm018.htm
http://chevy.oldcarmanualproject.com/fisher/1939_40/index.htm

 

i use this stuff from 3M.

 

Thanks for all the info much appreciated. I'm looking for them so I can put it all back together.

Thanks again for the help!

 

your welcome. you will find that stuff very useful. it has enough "body" it can be used to fill holes as big as 1" and can be used as a gasket to seal out water, like when used under roof strips. unlike silicone it removes easily. it also will hold a nut in a socket, or i have even used it to hold a nut or bolt on one side of a panel so i could attach the adjoining hardware to the other side of the panel that was out of reach.

 

I've always referred to that stuff as Butyl tape, although I could be wrong about that. Helps keep out the squeaks too, I think it's a good idea to use something in there.