I copied this off of a search of crt liquid......and my tv guy that owns a 40 year old business told me the liquid was a glycol (anti-freeze is a type)
A coolant-sealed cathode ray tube for projection color television was disclosed by Sony Corporation at the IEEE Chicago Spring Conference on Consumer Electronics, June 4, 1981. The CRT front panel is composed of two flat glass plates, one for the face panel and one for the screen panel. A mixture of ethylene glycol and water is sealed between the two panels, making cooling contact primarily with that part of the face panel through which the image passes, and with the immediately adjacent area. The face panel and screen panel are held in relative adjacency by a cast aluminum bracket which also acts as a separator for the two panels. A temperature-vulcanized silicone is used as a sealant and for bonding the panels to the bracket. The benefit attained is said to be a lowering of face panel temperature by as much as 20 degrees Centigrade during operation.
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