Recently, I have a project that needs to use a high vacuum system. During the construction process, I encountered a problem: I need to stick mica or glass to the window of the copper wall (one side is the atmosphere and the other side is a vacuum lower than 1 Pascal), which requires adhesive. However, after browsing the information, I found that the cured adhesive is easy to release gas and destroy the vacuum in the system. So now I need to find a glue that will not release gas after curing. I heard that hysol 1C may meet the requirements, but I got a negative answer after asking the local seller, so I published this for help.
Glue is represented in red, copper is represented in black and glass is represented in blue.