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MG Chemicals 842AR-P Silver Conductive Pen, 8.6g, 1 Pack

4.0 4.0 out of 5 stars 853 ratings

$73.63
Silver
5 mL
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Purchase options and add-ons

  • Creates durable, reliable, highly conductive connections
  • Volume resistivity: 0.0001 Ω·cm
  • Typical trace width: 0.9 mm
  • Dries to touch in minutes
  • Adheres to plastics, epoxy, copper, aluminum, ceramics, wood, and most electronic substrates as well as ABS, PLA, and other 3D printing plastics
  • Attention: Shake rigorously before use! For best results hold pen at angle, depress pen tip against surface, and draw pen across surface while gently squeezing middle.

Product details

  • Is discontinued by manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 2.56 x 19.84 x 5.12 cm; 25 g
  • Date First Available ‏ : ‎ Sept. 11 2016
  • Manufacturer ‏ : ‎ MG Chemicals
  • Place of Business ‏ : ‎ SURREY, BC, V4N 4E7 CA
  • ASIN ‏ : ‎ B01LYXQE0M
  • Item model number ‏ : ‎ 842AR-P
  • Country of origin ‏ : ‎ Canada
  • Customer Reviews:
    4.0 4.0 out of 5 stars 853 ratings

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Product description

The 842AR-P Silver conductive pen is an extremely conductive, fast drying paint in a convenient pen format. It quickly and easily creates durable, reliable, corrosion resistant, and highly conductive traces. It adheres to a wide variety of substrates. This product works best on smooth, flat, and hard surfaces. It has a Valve tip that opens when the pen is pressed against the surface to be drawn on and it has a soft tube, so the flow may be controlled by squeezing the center of the pen. Applications & usages it is used to draw traces on circuit boards or to create simple circuits on a variety of surfaces for prototyping, hobbies, or Maker projects. It can be used to repair damaged traces on keyboards, game controllers, remote controls, mixing boards, and pcbâ€s. Repaired devices may be returned to service in only 10 minutes. It is also great for making small connections in or between circuits such as jumpers, through-holes, bridges, and links. It is also good for increasing the surface area of contacts by painting the area around them. It is also great for filling gaps in your EMI/RFI shielding. Attention! shake rigorously before use. For best results hold pen at angle, depress pen tip against surface, and draw pen across surface while gently squeezing middle.

Top Brand: MG Chemicals

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From the manufacturer

Conductive pen trace
F&B
838

838AR-P – Carbon Conductive Pen

A circuit repair pen that dispenses acrylic lacquer pigmented with conductive carbon. The cured traces are durable and corrosion resistant, with fair conductivity. They adhere well to plastics and most electronics substrates. The valve tip opens when pressed against a surface, and the flow is controlled by squeezing the barrel. The product works best on a smooth, flat, hard surface, but the cured traces are highly flexible.

This circuit pen fixes damaged traces on keyboards, game controllers or remote controls. It is also useful for making small connections, such as jumpers and bridges. It is great for drawing resistors and can be used to increase the surface area of contacts by painting the area around them.

838

Carbon

841

Nickel

842

Silver

Comparison Chart

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Customer reviews

4 out of 5 stars
4 out of 5
853 global ratings
Arrived defective
2 Stars
Arrived defective
Went to use the pen for the first time. It appears the paint tip separated from the resivoir then dried up.
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Top reviews from Canada

Reviewed in Canada on August 18, 2022
Style: NickelSize: 5 mLVerified Purchase
Used it to successfully repair several ZX81 ribbon cables. The dispenser tip may be fine for the silver and carbon versions of this product, but the silver version it doesn't work very well, hard to control how much is dispensed. So....after shaking vigorously, just remove the cap by turning it CLOCKWISE (backwards from the normal unscrewing action), then use a toothpick to get whatever amount you need, and dab it onto whatever you're repairing. Don't leave the cap off long, as it can dry out.
Customer image
S
5.0 out of 5 stars Poor dispenser, great product, here's a tip for workaround, and ZX81 ribbon cable repair
Reviewed in Canada on August 18, 2022
Used it to successfully repair several ZX81 ribbon cables. The dispenser tip may be fine for the silver and carbon versions of this product, but the silver version it doesn't work very well, hard to control how much is dispensed. So....after shaking vigorously, just remove the cap by turning it CLOCKWISE (backwards from the normal unscrewing action), then use a toothpick to get whatever amount you need, and dab it onto whatever you're repairing. Don't leave the cap off long, as it can dry out.
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One person found this helpful
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Reviewed in Canada on January 23, 2022
Style: NickelSize: 5 mLVerified Purchase
I had a A1048 keyboard that had two broken keys, and I was able to redraw the traces on the Mylar PCB using the pen. The nickel coating is easy to scrape off for the first few seconds, so you can fix some minor mistakes, but you’ll have to be quick because once it dries, the nickel is on there for good. The pen is confusing at first to use, since you have to squeeze the center while pushing down on the pen (there’s a little metal pin in the middle of the tip), but it isn’t bad once you get the hang of it.
Reviewed in Canada on June 15, 2019
Style: NickelSize: 5 mLVerified Purchase
I bought this to repair a broken lead on a flex cable. For that purpose it worked well with a few caveats.

1. Applying this is tough. The pen releases the paint when the metal tip is depressed. It's very difficult to control the flow rate and often you get more 'paint' than you want of need. In practice it's difficult to apply small, thin lines unless you use masking of some type.

2. If you need to build up areas (two of more coats) for coverage the applicator tends to scrape off previously applied paint.

Despite application issues it does work well and adheres well to substrates. Good in a pinch.

It also smells terrible so use in a wet ventilated area and I'd avoid getting it on your skin just for good measure.
Reviewed in Canada on May 30, 2023
Style: NickelSize: 5 mLVerified Purchase
Received the product in time and package in good condition. When I tried the product, I had a hard time doing a single trace of 5mm x 1mm. I stored the product in the refrigerator. 2 weeks later, needed to make a correction on a board , the pen was either already empty or dry. Total ripoff 25 bucks for a single trace correction!!
Reviewed in Canada on February 13, 2024
Style: NickelSize: 5 mLVerified Purchase
This stuff really works. Fixed a calculator with broken trace under a button. Will try to use it on a rear window heater in the car. Higher currents, but maybe it will work too.
Reviewed in Canada on July 14, 2023
Style: NickelSize: 5 mLVerified Purchase
I used this product to fix an old TV remote control (generic replacement units did not work with this TV). The conductive pen worked. The next time I tried it couple of months later, it was unusable. I think it dried out. I should have tried graphite conductive paint.
Customer image
3.0 out of 5 stars For single use only
Reviewed in Canada on July 14, 2023
I used this product to fix an old TV remote control (generic replacement units did not work with this TV). The conductive pen worked. The next time I tried it couple of months later, it was unusable. I think it dried out. I should have tried graphite conductive paint.
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Reviewed in Canada on September 17, 2023
Style: NickelSize: 5 mLVerified Purchase
it fixed what it needed to.. easy to use and effective
Reviewed in Canada on December 22, 2023
Style: NickelSize: 5 mLVerified Purchase
Très efficace merci

Top reviews from other countries

leo wink
5.0 out of 5 stars Fixed my control panel keypad
Reviewed in the United States on October 5, 2023
Style: NickelSize: 5 mLVerified Purchase
I'm very glad this product exists. Saved me hundreds of dollars!
The material flows pretty well once you get the hang of it. It's similar to a paint pen, but with nickel in solvent. Let it dry! It wont conduct until the metal settles and the solvent dries. It was fun to use a multimeter and watch the resistance drop as the fluid cured.
I used this to repair a laminated keypad ribbon cable in a microwave that somehow got a melty trace. I also used it to repair the damage I did trying to fix the problem before i knew this product existed. It will now and forever be a part of my electronics kit. Perfect for membrane trace repair!

Adhesion is good on plastic. The output width is about 2mm. It's a fluid but not super runny, especially after the solvent flashes off. Build up a couple of coats for best conduction.

It takes a minute to get used to dispensing the material. The pen uses a plunger valve tip that has to be pushed against the surface before flow will start. You control the flow with how hard the tube is squeezed. Wiping the tip after every lift-up makes things go smoother.
One person found this helpful
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Moof
5.0 out of 5 stars Works great on keyboard membranes
Reviewed in the United Kingdom on September 14, 2020
Style: CarbonSize: 5 mLVerified Purchase
This just saved my stream deck from death.
Laid it on fairly heavily over a broken trace for the keyboard membrane. Testing conductivity a few hours later it did not look promising. Testing provided no improvement. So I put it in to the pile of disappointment and sorrow. A few days later I thought lets try it again but low and behold it was working! I guess it takes a few days to properly cure.
Phew. £140 saved!
One person found this helpful
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Sachin S.P.
4.0 out of 5 stars Good product but tip gets blocked soon
Reviewed in India on December 31, 2019
Style: NickelSize: 5 mLVerified Purchase
Very useful. It is just like a correction pen.
But when I used it, soon the tip got blocked and no more ink was flowing. So I had to cut open the body and use a small stick to scoop the ink and paint.
However, ink is good, dries fast, sticks well on plastic surface.
I ordered it to repair keypad of an old spectrometer. We saved around 1-2,00,000 rupees.
Customer image
Sachin S.P.
4.0 out of 5 stars Good product but tip gets blocked soon
Reviewed in India on December 31, 2019
Very useful. It is just like a correction pen.
But when I used it, soon the tip got blocked and no more ink was flowing. So I had to cut open the body and use a small stick to scoop the ink and paint.
However, ink is good, dries fast, sticks well on plastic surface.
I ordered it to repair keypad of an old spectrometer. We saved around 1-2,00,000 rupees.
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Customer image Customer image
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Luna L.
5.0 out of 5 stars Works great for repairing keyboard membranes
Reviewed in the United States on December 30, 2023
Style: SilverSize: 5 mLVerified Purchase
I've been using these to repair the plastic membrane sheets of my IBM and Unicomp Model M mechanical keyboards for several years and have gone through at least three so far. The silver pens are expensive, but I read somewhere that it's best to keep using the same metals throughout, so I buy those.

They're not the most intuitive to use, so you should make sure to try it out on a piece of scrap paper or something you're not afraid to ruin to get the hang of it. Always make sure to give it a good shake first (like a paint marker) and squeeze the body while laying the ink down. And if you mess up, even after it dries, it's easy to scrape away with something like a screwdriver or an exacto knife, at least on smooth plastic.

My picture is of some traces I repaired on a Model M membrane. I accidentally scraped them off while cleaning away a nasty stain and fixed it using this pen.
Customer image
Luna L.
5.0 out of 5 stars Works great for repairing keyboard membranes
Reviewed in the United States on December 30, 2023
I've been using these to repair the plastic membrane sheets of my IBM and Unicomp Model M mechanical keyboards for several years and have gone through at least three so far. The silver pens are expensive, but I read somewhere that it's best to keep using the same metals throughout, so I buy those.

They're not the most intuitive to use, so you should make sure to try it out on a piece of scrap paper or something you're not afraid to ruin to get the hang of it. Always make sure to give it a good shake first (like a paint marker) and squeeze the body while laying the ink down. And if you mess up, even after it dries, it's easy to scrape away with something like a screwdriver or an exacto knife, at least on smooth plastic.

My picture is of some traces I repaired on a Model M membrane. I accidentally scraped them off while cleaning away a nasty stain and fixed it using this pen.
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Customer image
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2 people found this helpful
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D. Haigh
1.0 out of 5 stars Not conductive, but can make a lovely resistor with it
Reviewed in the United Kingdom on April 21, 2024
Style: NickelSize: 5 mLVerified Purchase
expected this to be conductive like the description said. But it's not. It has resistance. So not suitable for what I needed, repairing broken circuit traces. This is similar to the carbon in a solution products you can buy at car shops. Not recommended. But it does dry quick.