If your two flanges have a fairly small gap between them
you can use plain old paper as a gasket. It swells a bit
when it gets damp and makes a nice seal. It's also dirt
cheap! Be sure to use non-printed and non-colored paper.
Butcher paper is easy to get and comes in a size large
enough to cover most boilers with ease.
Simply hold a piece over your flange, trace the pattern
with a pencil, and cut out your gasket. If you have too
large of a gap, try using card stock paper.
--- In Distillers@yahoogroups.com
, "cmfolkpottery <clete@m...>"
> my first boiler pot is a 41.5 quart All american aluminum press.
> cooker. will weld old thick aluminum 2 quart dutch-oven (turned
> upside-down) to lid of press. cooker to establish flat surface to
> attach 2" flange. My question: Between 2' copper flange-fitting and
> aluminum flat-surface its' to be attached .. What is satisfactory
> material or compound to use as sealant? (gasket-material, high-temp
> silicone, ?) thanks for help