Re-coating flybacks, what do you use?

[jshorva65]

Silicone RTV typically won't require as much thickness as the original wax due to the much greater dielectric strength of TV Service grade silicone RTV specifically intended to be used as HV insulation. About 1/16" thickness should withstand 10kV. After all, that stuff is intended for use with modern 27" to 35" color tubes, projection sets, computer monitors, etc. and their anode supplies of up to 30kV or more.

Now that I have a set of transparencies and an instruction manual (an eBay find) on the way for the B&K 1076 that I picked up at a garage sale a few years back, I've removed the old, cracked and partially-missing wax from its still-working flyback and a thin coat of HV-rated silicone will be replacing the thick wax, with extra thickness around where the 1X2 plate cap lead exits to maintain mechanical strength.