Roxy, I wouldn't touch your comment with a ten inch pole.
Rodman, I have a few of these fuses. They are not completely filled with the polymer. Maybe about 75-80%. I don't know what the coefficient of thermal expansion is for this particular polymer, but it would take an enormous amount of heat to pressurize the fuse to the point of breaking the glass or pushing off the end cap. This particular fuse is a 800 milliamp fast blow fuse. If the OP's Sony drew enough current to do this, he's got more to worry about than a non conductive polymer on his PC board.
Rodman, I have a few of these fuses. They are not completely filled with the polymer. Maybe about 75-80%. I don't know what the coefficient of thermal expansion is for this particular polymer, but it would take an enormous amount of heat to pressurize the fuse to the point of breaking the glass or pushing off the end cap. This particular fuse is a 800 milliamp fast blow fuse. If the OP's Sony drew enough current to do this, he's got more to worry about than a non conductive polymer on his PC board.