Liquid Electrical Tape

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Delivery to mainland UK only
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Liquid Electrical Tape - brush on insulation


Note: currently only available for delivery within mainland UK by Parcelforce. See 'Availability and Shipping' below for details.

Video: Liquid Electrical Tape

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

Stocked in response to customer demand!

Download the product safety data sheet here.


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.


Liquid Electrical Tape is currently only available delivered by Parcelforce within mainland UK, or for collection from our office.

Parcelforce will only carry this item by road within the UK, and will not carry it internationally, or to areas that are serviced by air or sea (such as islands). We can also send Liquid Electrical Tape by DHL for larger orders, but at a higher cost and similarly limited to the UK but with some extra postcode exclusions.

The reason for these limits is because before it dries, liquid electrical tape is a flammable liquid, much like nail polish or some types of paint are. This means that there are restrictions on how we can legally ship it. If we are unable to send this product to your address, we suggest buying it directly from a Plastidip distributor instead:

Note that for most of these, we have no personal experience of buying from them, they are just listed here for convenience. There may be other suppliers available in your country. If you have any suggestions for additions to this list, please send us an email!


45 Reviews Hide Reviews Show Reviews

  • 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 6th 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*

  • 5
    Liquid Tape

    Posted by Matty The Flying Fish on 13th Sep 2018

    Got introduced to this in Germany whilst working with our American cousins and have been itching for a reason to get some for my personal use! That use was sealing and providing some anti-chafing for model servo wires where they exit the case, which it did perfectly and now I have to think up of some other reasons to use it 'cos it's brills!!

  • 5
    Liquid tape

    Posted by Tony G8YFA on 1st Sep 2018

    Use with care, but works very well, and lasts.

  • 5
    Liquid Tape

    Posted by Ian on 20th Jun 2018

    Requires a re-coat to get a good thickness of insulation, but generally seems to be a good product. Yet to see if it keeps out rain, as we have had little rainfall in the south.

  • 5
    Wonderful goo

    Posted by SM7IUN on 8th Jun 2018

    Excellent sealant and perhaps most important - the same dielectrical characteristics as air so it will not detune your design when weatherproofing it.

  • 5
    Liquid Tape

    Posted by Dave G7OPC on 22nd Apr 2018

    I used the liquid tape to waterproof I recently purchased Sotabeam trap kits for a 3 band vertical antenna project. Not only was it easy to apply on the traps, but very importantly it didn't detune them. Also used the liquid tape for sealing the connection box and coax connections. Ideal!!

  • 5
    Quality product.

    Posted by Allen on 13th Apr 2018

    As they say,you get what you pay for. Easy to apply with supplied brush,and lasts longer if kept in a cool place.Recommended.