[kc8adu]

this stuff is not silicone.
i will get the can later when i go to my shop.
these tubes are a lot tougher than you think.
i have seen ge and channel master rebuilts come in without the cover glass.
no bands around the faceplate either.
the last rebuilts i got from vdc have the proper laminated front.
i set a dead 21fjp22 without a laminated face out back of my shop and tossed rocks at it.
all that did was chip the face.
after i knocked the neck off i put it in the dumpster and it took a very hard hit with a hammer to break the faceplate.this tube had a bad burnin from vertical deflection loss so not worth rebuilding.
btw i have seen 3 types of cateract type failures.
1 is a simple delamination.
2 is mold or fungus growth in the pva.
3 is yellowing or the green halo.(mostly zenith and sylvania)