Down pipe gasket
We have them in stock. Uncompressed they are .085.
Compressed they go to .050.
You would really have to check your puck to make sure it has the extra length to seal this up.
Otherwise it would prevent the puck from sealing 100%.
$20 & shipping if you want 1. Should be about $1.50 thru usps with a delivery confirmation #.
They are not on the site because I thought they would cause more problems then help. It was something we had built a while ago.
The material is like a header gasket material not copper.