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Using Glue Gun for Insulating Charger Cables: Efficacy of Hot Melt Adhesive as Insulator

zuczek1987 23151 13
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Can hot-glue from a glue gun be used to insulate spliced charger cables when heat-shrink tubing does not fully cover the conductors?

Hot-melt glue can insulate a low-voltage charger splice, but it is not a substitute for proper insulation where high puncture resistance or mains/primary-to-secondary isolation is required [#6797979] It is usually an ethylene-vinyl acetate (EVA) copolymer, not polyethylene [#6798213] One reply notes that it softens when heated, so it is not ideal if the power supply itself gets warm [#6806883] For a charger-side repair around 19 V / 4.74 A, one poster considered it acceptable because the glue’s plasticisation starts at temperatures well above those found in the charger [#21830773] If you want to use it, check the adhesive’s dielectric parameters in its datasheet/TDS [#7084609]
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  • #1 6797832
    zuczek1987
    Level 23  
    Posts: 426
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    Forum members, I would like to know if the glue from the glue gun can be used as an insulator and will it be a good insulator?
    Namely, the cables in the charger are such that I can't insulate them fully using only heat shrink tubing, and that's why I would like to flood the fragments with glue from a glue gun, but I don't know if it will insulate?
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  • #2 6797836
    Tomek331
    Level 26  
    Posts: 1065
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    So.
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  • #3 6797939
    MamAtE
    Level 20  
    Posts: 278
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    Yes, it's polyethylene. It will be fine, but only if there are no air bubbles in it.
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  • Hot melt lacks puncture resistance for mains isolation

    #4 6797979
    cyruss
    Level 31  
    Posts: 1365
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    It will insulate as long as you don't melt the insulation of the wires and make a short circuit. You will not isolate extreme voltages so that a breakdown can occur, hence the comment about bubbles does not make much sense. However, the adhesive should not be placed between the conductive elements of the mains and low-voltage (secondary) sides because it does not provide the required puncture resistance.
    And it's definitely not polyethylene...
  • #5 6798213
    Ryszard49
    Level 39  
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    It is usually a copolymer of ethylene vinyl acetate.

  • Questioning hot-melt glue as charger cable insulation

    #6 6798241
    zuczek1987
    Level 23  
    Posts: 426
    Help: 63
    Rate: 80
    no glue would be used instead of insulation on the charger-notebook side, the voltages and currents that occur there are:
    19V
    4.74A
    90W
    I have this data on the charger.
    And the glue is supposed to insulate because the cable looks so funny:
    In the middle, a small strand of insulation, around this insulation, a strand that looks like shielding, then another insulation, and again a strand that looks like shielding. Well, once I cut this cable, I have no way to connect it with T-shirts so that they don't touch anywhere, it's also an idea with this glue gun. I was hoping this glue would be rubber or silicone based and would be a good insulator, but I wanted to make sure before I did so I wouldn't burn the charger or notebook by shorting it.
  • #7 6806883
    cyruss
    Level 31  
    Posts: 1365
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    Well, try it. Just remember that the glue softens in the heat and each power supply gets a little warm.
  • #8 6807560
    keseszel
    Level 26  
    Posts: 4110
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    When I hit the insulation when drilling in the wall, I use hot glue. I used to drill a hole for a can. Long live progress ;-)
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  • #10 6810329
    unemake
    Level 16  
    Posts: 128
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    Quote:
    When I hit the insulation when drilling in the wall, I use hot glue. I used to drill a hole for a can. Long live progress

    It's not progress - it's just fluff. I don't understand how you can justify your own laziness in this way and brag about it on a forum. Are you sure you always only damage the insulation?
  • #11 7084609
    poker63
    Level 10  
    Posts: 35
    Rate: 11
    In the Tds tab of the adhesive, check the dielectric parameters.

  • Epoxy resin suggested as heat-resistant insulator

    #12 21829477
    adam19sz88
    Level 1  
    Posts: 1
    And epoxy resin? UV-cured? After treatment it is as strong as plexiglass.... and I think more heat resistant than hot glue

    Added after 14 minutes:

    Then plug in an electric kettle of some sort, a casserole, a deep fryer or a microwave.... The coils won't just heat up in your head from what you see.... They will also heat up in the place where you used this method.... It will even leak through the plaster. A stain at best. And have you ever encountered the wall kicking up electricity...? A phase like nothing, if sadomaso you are. This is the sort of thing you used to do when you were a teenager


    Moderated By ArturAVS:

    3.1.19. Publishing posts in archive discussions. Archived discussions are defined as discussions marked by the Service Provider as: Archive Topic or Archive Thread.

  • #13 21830773
    398216 Usunięty
    Level 43  
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    keseszel wrote:
    As I hit the insulation while drilling into the wall I use hot glue

    And all I had to do before was use a live cable sensor.... Long live progress... :)
    Re Rem:
    The use of hot glue in this particular case has no contraindications. The glue is an insulation, and its plasticisation starts at much higher temperatures than what can be found in the charger.

  • Hot glue used as cable insulation repair

    #14 21830821
    keseszel
    Level 26  
    Posts: 4110
    Help: 54
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    398216 Usunięty wrote:
    keseszel wrote:
    As I hit the insulation while drilling into the wall I use hot glue

    And all I had to do before was use a live cable sensor.... Long live progress...


    Back then I didn't have one. Nowadays -sometimes the whole wall rings. A sensor is not everything, I have 3. Discussions about the superiority of sensors are behind me and I approach the reliability of the indications like a moron called AI chat.
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Topic summary

LABEL_AI_GENERATED
The discussion examines whether hot glue from a glue gun can be used as electrical insulation for a charger cable repair. The cable in question has a complex layered construction, making it difficult to fully restore with heat-shrink tubing alone, so the idea was to flood the exposed section with hot-melt adhesive. Responses note that hot glue can provide insulation for low-voltage wiring if applied carefully and without damaging the wire insulation or creating shorts, but it softens with heat and is not suitable where higher puncture resistance is required. The adhesive is identified as typically an ethylene-vinyl acetate copolymer, and its dielectric properties should be checked in the datasheet. The charger output mentioned is 19 V, 4.74 A, 90 W, and the final opinion is that hot glue is acceptable in this charger-side application because the temperatures involved are below its plasticization range.
AI summary based on the discussion. May contain errors.
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