Mine separated too. It's in a sealed old-fashioned oil can (long skinny spout, squirt by pushing bottom) . When I used it a vigorous shake before applying worked. I used it successfully on the 4 bolts on the Ford 1210 muffler flange.I tried the ATF-Acetone mix, and it wouldn't stay mixed. Stored it in a translucent plastic squeeze bottle labelled for Acetone use.
Had varying luck with a number of different penetrants. An odd one that has worked on some things was WARMING, not real hot, the piece and melting wax so it wicks into the corrosion.
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