Quote:
Originally Posted by Tom Albrecht
Just to follow up on the idea of sealing a CRT leak with caulk --
NO polymeric material is a good long term vacuum seal. Every plastic or rubbery material known has a finite permeability to gasses, including the constituents of air like nitrogen, oxygen, and water vapor. You can't even keep humidity out of enclosure with a polymeric mareial, let alone keep a high vacuum over time.
For a good vacuum seal, you need to use metal, glass, or ceramic. There is a reason why you never see any other materials used on something that needs to hold a high vacuum over extended periods of time.
|
Yeah, that was my brain-child. I thought a high grade clear silicone bead was air tight, and that it would be held in place, or not disturbed, by vacuum pressure drawing it tight to the seam, if and when a leak did transpire.
I know about their shortcomings in the automotive world, but that involves OUTWARD pressure, not inward.
