Sometimes, I work on panel boxes with big aluminum wires coming in. I
can get Noalox. Or, Ox-Gard, which is grey paste that retards
corrosion.

Is something available in a spray can, so I can apply it to live wires
from a comfortable distance?


*Unless you see evidence of corrosion or arcing, the only maintenance that
needs to be done is torque the connections to make sure that they are tight.