Crown CE2000 PA Amp Question - thermal glue?

[PfeifferElectronics]

I am repairing a crown CE2000 amplifier. There are four transistors encased in what looks like silicone glue; attaching them to the power transistor heat...

[Tone Meister]

I'm in a bind and need to source thermal grease locally for use with TO-220, Multiwatt15, etc transistors, and I need to source it TODAY. The local electronics...