Make your own Gaskets?

I'm putting my 66 skylark back together and wanted to make a few gaskets. Primarily for my rear quarter extensions , but also for my tear drop. I saw advanced auto sells a blank paper sheet, I was hoping for something in a rubber or poly material. Almost thinking of using rubber roofing material or similar. Thanks for any advise.

 

I bought a roll of neoprene... used it for the qtr extensions and for the heater box and front vent seals. Seems near identical to the original material.
https://www.amazon.com/gp/product/B08XPKYJ2B/

 

I made my qtr extensions from Neoprene I got at hobby lobby..

 

You can also buy neoprene at fabric stores.

 

Geez! I read the last word of the thread title as starting with a C rather than a G. WTH!

 

We are all currently making our own caskets!!!

 

What thickness neoprene is everyone using 1/16" or 1/8"?

 

1/8th........ 16th is way to thin....

 

Fel pro has a diy gasket kit with various thicknesses and materials

 

Sharpened up metal tubing is good for punching holes. I do this quite a bit..