Liquid Electrical Tape

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Liquid Electrical Tape - brush on insulation


With the high price of coaxial cable and antennas can you afford not protect your investment with this great product? Dries in minutes and is impervious to water.

Stocked in response to customer demand!



Customer Comments

G-QRP Reflector - 18 August 2007

If any of you are thinking about getting some liquid tape off Richard.... Do so!!  I can only say 'it's superb!'...

Ian, G3ROO


Liquid Electrical Tape is an air-dried, synthetic rubber coating that can be brushed on and exhibits excellent moisture, acid, alkaline, abrasion, and dielectric resistance.

Offers far more efficient sealing than sticky cable seals and tape. Perfect for quick access and portability! Great for sealing all antenna connections. The coating is flexible making it ideal for use on portable antenna connections. Tests we have done show that the product, unlike many other sealants, does not affect the Q of toroids used at HF - it has good dielectric properties and low losses.

Liquid Electrical Tape remains flexible even under extreme conditions and won't crack, harden, or peel.

Electrically insulates to over 1380volts/ml.

Liquid Electrical Tape is excellent for use in a variety of applications including electrical connections and components for boats, trailers, cars and lorries, timers, outdoor wiring, instruments, computers, circuit boards, switches, radio antennas, and many more. Easily removed from non-porous surfaces.

Supplied in a 4 fl.oz (118ml) container, with applicator brush mounted in the lid. Colour - Black. One can contains enough Liquid Tape for dozens of connections.

Use on Aerials

Have you ever felt that your aerial system is not performing quite as well as it used to? Maybe the beacons are just a little weaker or the DX is that much more difficult to work? One common reason for such observations is getting water inside your feeder cable. Rainwater will leak in wherever it can and few sealing methods offer good long-term protection. The design of coaxial cable is such that it draws water in by capillary action. The water can then corrode the wires inside the coax, it also degrades the dielectric performance - increasing losses - sometimes dramatically. Meanwhile back in the shack often all appears well. Increased cable losses make the SWR of aerials look better, but your power is not being radiated, it's heating up the inside of your damp cable. As often as not, water ingress goes un-noticed until water drips out of the cable inside your shack. In the meantime you have been using a radio system that has been below par for months or even years.

Liquid Tape is the answer! This product is easily painted onto all types of electrical joints using the brush applicator within the can. It dries in just a few minutes leaving a low-loss, flexible and impervious coating on your cable. No more water ingress! A single 118ml can contains enough of the product for dozens of connections!


Liquid Electrical Tape is potentially harmful to health. It must be used only as indicated on the pack. Wear impervious gloves and eye protection when using this product. Use in a well ventilated area. Store away from children. Download the product safety data sheet here.

Once fully dry, no special handing or precautions are required.

40 Reviews Hide Reviews Show Reviews

  • 5
    Very good

    Posted by Lélio de Almeida on 10th Feb 2020

    Very easy to apply, Makes a elastic protection of the wires. Very useful where we can't use isolator tape.

  • 5
    Liquid Tape

    Posted by Rob Evans on 8th Dec 2019

    I have used this for a few years now, better than Self amalg tape. I had a problem with water in a gamma match, after sealing it with this liquid tape no more issues.

  • 5
    Liquid tape

    Posted by Leslie Butterfield on 25th Jul 2019

    does exactly what it says on the tin !

  • 5
    Performix Liquid Tape

    Posted by Gust Kegelaers ON6KE on 21st Jul 2019

    This stuff is MAGIC, applied several coatings on antenna connectors about a year ago, put up another antenna, checked the old connections, perfect. In the mean time I had stored the bottle in the fridge, this morning pulled it out, requiring it for a coating on the connector to BALUN for a new antenna. the liquid was 100% useable, wasn't hardened out, not in the least. Excellent!

  • 5
    Liquid Tape

    Posted by Robert Dunne on 8th May 2019

    Great product for waterproofing electrical or RF connectors. Make sure you put insulating tape on the connections before you apply the liquid tape if you want or need to redo the connections in the future.

  • 5
    Liquid Tape, every radio experimenter should have some

    Posted by Martin Shelley on 24th Apr 2019

    This is my third purchase and is my sole product for sealing and waterproofing aerial connection joints. Two or three coats over a PVC tape joint cover is a perfect seal for the life of the cable and aerial.

  • 5
    Liquid Electrical Tape

    Posted by 2E0NTV on 23rd Dec 2018

    I heard good things about this and so bought myself a jar. I'm glad I did - it's great stuff. I wanted to weatherproof a new quarter wave ground plane antenna that I'd just built. It goes on as thick as tar but is dry to touch in about 10 minutes. A couple of coats and it completely seals like a seamless piece of heat-shrink tubing that moulds to whatever shape you spread it on. You get a really professional looking job but more importantly it gives insulation and weather-proofing. I'll certainly be buying another jar soon!

  • 4
    Liquid Tape

    Posted by GW1AKT on 7th Dec 2018

    Does the job very well, but can be a little messy if you are not carefull.
    Once opened it has a fairly limitted shelf life.

  • 5
    liquid tape

    Posted by phillip witts on 19th Nov 2018

    does exactly what is says on the label great stuff 5*