[R-390] RTV for sealing, what we used before, the black stuff

[Norman Ryan]

Tisha wrote (in part):




   If you ever have to remove the pitch or bitumen you can do it either byheating or the use of solvents. Both have some serious disadvantages, the combustibility point for both is pretty close to the melting point and you
will end up with a roaring fire if you are not careful (live steam might be a good way to melt it, but how many of us have pressurized boilers?).  Solvents have issues as well as it will dissolve the lacquer in a
transformer, break down Bakelite or unwind paper caps.

I write:
 After digging out the bitumen (aka uckumpucky) I've had good luck cleaning up electrolytic capacitor cans with paint thinner (at room temperature).  Lacquer thinner or anything stronger likely will dissolve stenciled on labeling, etc.  Admittedly it's slow going, but worthwhile.

Norman