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Some self-wound toroid inductors from a HF-radio kit are sitting a bit too loose on their PCB for my liking; they stand upright and are only held in place by the thin enamel-coated inductor wire that wraps around the toroid.

I'm thinking of applying a dab of Liquid Electrical Tape to glue the toroid to the PCB, but apart from the Dielectric Strength (of about 1200V/mil) there's no mention of any AC characteristics on the product's website.

Can Liquid Electrical Tape be used for HF purposes without degrading the electrical characteristics of the components around it? Is hot-glue or clear silicone from a hardware shop just as good?

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  • \$\begingroup\$ What on earth is liquid electrical tape? \$\endgroup\$
    – Hearth
    Commented Oct 27, 2019 at 22:06
  • \$\begingroup\$ It is an air hardening liquid substance that provides electrical insulation. Google will tell you a lot more.. \$\endgroup\$
    – captcha
    Commented Oct 27, 2019 at 22:19
  • \$\begingroup\$ Is the "tape" going to contact any of the wires, or just the cores? \$\endgroup\$
    – The Photon
    Commented Oct 28, 2019 at 0:44
  • \$\begingroup\$ There is not enough clearance to just stick the cores to the pcb, so the wires will also get covered with the stuff. Ideally, if this substance is similar to air from a dielectric point of view, I'd like to use it to secure the windings to the toroid as well. \$\endgroup\$
    – captcha
    Commented Oct 28, 2019 at 2:11
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    \$\begingroup\$ If Google knows a lot more then it is a really really really good idea for YOU to provide some links. Expecting people to fetch and carry for you tends ti be unproductive. || NEUTRAL CURE silicone rubber in modest quantities is liable to 'do the job'. I do not know its dielectric properties but mechanically it will last 20+ years if suitably sized to the task. || Non neutral cure should never be used in electronics applications. \$\endgroup\$
    – Russell McMahon ♦
    Commented Oct 28, 2019 at 8:28

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I would use candle wax. I've seen it done before.

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