Potential alternative to frit glass and Epotek?

[Electronic M]

It sounds like a decent potential solution. One thing I'd be curious about is its stability long-term. It is safe to say most to all 15GP22s are going to survive (as physical objects, but not necessarily as working parts) the next 1-2 decades, barring accidents and failed rebuild attempts, possibly the next 1-2 centuries for some number of examples. If treated with this adhesive do we know that it will last over a decade (and if so how much) without breaking down and or failing in some way?

Also, some good tubes were coated with VacSeal that IIRC is known to be ineffective...Can this apply to those CRTs too?

[WA3WLJ]

VacSeal Only works when actively pumped on during the cure process. Just applying it is like putting on a Band-Aid without removing the wax-paper strips.

[benman94]

Originally Posted by Electronic M

It sounds like a decent potential solution. One thing I'd be curious about is its stability long-term. It is safe to say most to all 15GP22s are going to survive (as physical objects, but not necessarily as working parts) the next 1-2 decades, barring accidents and failed rebuild attempts, possibly the next 1-2 centuries for some number of examples. If treated with this adhesive do we know that it will last over a decade (and if so how much) without breaking down and or failing in some way?

Also, some good tubes were coated with VacSeal that IIRC is known to be ineffective...Can this apply to those CRTs too?

Well this is just alumina and silicate. It's hard to imagine it breaking down to any appreciable degree given that it is essentially just a "paste" of rock. I do think the biggest threats to a tube treated with Peltron would be water and the solutions of acids or bases, but I can't imagine anyone taking their 15G with them for a swim so that's kind of a moot point.

Of course a low humidity environment for a successfully sealed tube would be advantageous, but given the propensity of the ultor flange to rust, low humidity has always been ideal.