Is this product on wires (that have not been compromised) where the outside plastic coating has been damaged, like a computer power cable?

Would work well to repair wire coatings that have been compromised. May require multiple applications to build up the desired thickness allowing dry time between applications. Works great!

If I used a different brush than supplied to apply this, what would I use to clean off the brush? Thank you for your time and assistance.

I am not aware of anything that would clean the brush. This is not paint. I would get an inexpensive throw-away brush and be done with it.

Is this product UL listed? Thanks.

But here is info from the manufacture that says UL will not approve due to various applications - same as what CV says... https://gardnerbenderfaq.wordpress.com/2014/05/30/is-liquid-tape-ul-approved/

I need to drill a hole in the back of my car to run a wire through, behind the license plate. Will this prevent the elements from getting inside the car?

You want to use a cable grommet, if you buy one thats already has a hole make sure it just a little smaller than the wire/cable you are using so it gets a good seal. You can buy them that doesn't already have a hole, again make sure that when you put a hole in it that its a little smaller than the wire. Keep in mind you have a outer diameter that you will size correctly for the grommet to fit in, and an inner diameter for the size cable/ wire .

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⚡ Seal the deal with liquid power – never let your connections go bare!

PRECISION APPLICATION - Smooth liquid consistency allows easy coating of cables, underground wiring, and electronics with 5-7 mils per coat.
DOUBLE DIELECTRIC DEFENSE - Provides twice the electrical insulation protection compared to standard tapes, ensuring safety and reliability.
UNRIVALED WEATHERPROOF SEAL - Rubber-based formula stays flexible, never cracks or hardens—even in extreme conditions.
VERSATILE INDOOR OUTDOOR USE - Perfect for home, automotive, marine, and security system applications—one bottle does it all.
COMPACT TRANSPARENT PACKAGING - Clear bottle design for quick content checks and easy storage in your professional toolkit.

Gardner Bender LTB-400 is a 4 oz. black liquid electrical tape featuring a waterproof, rubber-based coating that remains flexible and durable in extreme weather. Offering twice the dielectric strength at 200 V/mil, it insulates and protects cables, electronics, and wiring for indoor and outdoor use. Ideal for professionals seeking reliable, long-lasting electrical insulation in a compact, easy-to-apply formula.

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Brand	Gardner Bender
Colour	As shown in the image
Number of Items	1
Recommended Uses For Product	Security
Special Feature	Transparent
Water Resistance Level	Waterproof
Size	As shown in the image
Compatible Material	Plastic, Rubber
Net Quantity	118 millilitre
Item Resistance	waterproof
Global Trade Identification Number	00032076064037
Manufacturer	Gardner Bender
UPC	032076064037
Model number	LTB-400
Item Weight	113 g
Product Dimensions	10.16 x 17.78 x 5.08 cm; 113.4 g
Item model number	LTB-400
Item Height	2 Inches
Item Width	7 Inches
Included Components	1
Are batteries included?	No

Gardner Bender LTB-400 Liquid Electrical Tape, Black

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