Glass-to-metal seal absorb the stresses from thermal expansion mismatches. Due to its very low vapor pressure, indium finds use in glass-metal seals used in vacuum technology. Gallium is a soft metal with melting point at 30 °C. It readily wets glasses and most metals and can be used for seals that can be assembled/disassembled by just slight heating. It can be used as a liquid seal up to high temperatures or even at lower temperatures when alloyed with other metals (e.g. as galinstan). Mercury is a metal liquid at normal temperature. It was used as the earliest glass-to-metal seal and is still
XM Liquid Metal since the beginning of XM Satellite Radio's launch, but with the incoming of Major League Baseball and XM's MLB Home Plate talk station, XM Liquid Metal had to be removed from the satellites for extra bandwidth. On February 15, 2005, the switch was made. With the change, XMLM DJ Ward Cleaver moved to XM 48 SquiZZ to do mid-days. Unfortunately, unlike other XM Online channels, XM Liquid Metal was not carried of other services such as DirecTV or AOL Radio. For about a year, there were various complaints on XM online forums, and ones that were sent to XM themselves.