Certainly -  try:
http://cgi.ebay.com/SYLGARD-DOW-CORNING-P-N-3-4207-DIELECTRIC-GEL-A-B-BUY-/2
00535004013?pt=LH_DefaultDomain_0&hash=item2eb0d1536d#ht_1060wt_1059

This is a slightly different Sylgard formulation (actually better for your
need as an adhesive).  The price is right.

Best,

-ub
 

-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Unmitigated Fool
Sent: Sunday, November 14, 2010 2:29 PM
To: [email protected]
Subject: Re: [neonixie-l] Loose tube

I guess I couldn't locate that site.  Could you supply a link?

Larry

Ulysses Balis wrote:
> "Super glue or epoxy causing a crack if the tube expands more than the 
> base"
>
> Exactly why I initially suggested Sylgard-184.  It has a very high 
> elastic modulus and will not crack anything, even with extreme 
> temperature cycling.  As a potting compound, it was designed to be 
> compatible with all conventional materials that might be found in an 
> electronic / vacuum tube assembly.  With some searching it is 
> available in smaller two-part 100ml containers, which is not so 
> expensive at the larger jugs.
>

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