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MG Chemicals 841AR-P Nickel Conductive Pen, 7.5g

4.0 4.0 out of 5 stars 856 ratings

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Nickel
5 mL

Purchase options and add-ons

  • Creates durable, reliable, highly conductive connections
  • Low volume resistivity: 0.0068 ohms·cm
  • Typical trace width: 1.0 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

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 1.01 x 7.81 x 2.02 inches; 0.88 ounces
  • Item model number ‏ : ‎ 841AR-P
  • Date First Available ‏ : ‎ September 24, 2016
  • Manufacturer ‏ : ‎ MG Chemicals
  • ASIN ‏ : ‎ B01LYAA814
  • Country of Origin ‏ : ‎ Canada
  • Customer Reviews:
    4.0 4.0 out of 5 stars 856 ratings

Product Description

The 841AR-P Nickel conductive pen is a highly 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. 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 pcb’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. 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.


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
856 global ratings

Customers say

Customers have expressed negative opinions about the ink flow and leakage of the adhesives and sealants. They mention that the inking of the pen is very unreliable and the inked is not conductive. Customers are mixed on performance, conductiveness, value, quality, and drying time.

AI-generated from the text of customer reviews

89 customers mention58 positive31 negative

Customers are mixed about the performance of the adhesives and sealants. Some mention that it works pretty well, while others say that it didn't work.

"...Perfect for membrane trace repair!Adhesion is good on plastic. The output width is about 2mm...." Read more

"...board...I didn't get the board perfect as a few lines of the LCD display aren't working, but it at least turns on and works now...." Read more

"As described. Works like it should." Read more

"Worked perfectly to restore a short broken trace on the PCB of a music synthesizer keybed...." Read more

32 customers mention12 positive20 negative

Customers are mixed about the value of the adhesives and sealants. For example, some mention it's well worth the investment, while others say it'll waste money.

"I love the brand but this is a very bad product...." Read more

"I'm very glad this product exists. Saved me hundreds of dollars!The material flows pretty well once you get the hang of it...." Read more

"...Very disappointing. Back to the soldering iron." Read more

"...I cannot resolve, its a useless product. gave them a second chance, and same crap.AND ITS NOT RETURNABLE? I DEMAND VENDOR CONTACT ME..." Read more

20 customers mention8 positive12 negative

Customers are mixed about the drying time of the adhesives and sealants. Some mention that the ink dries almost instantly, while others say that it dried out without use. The product is conductive and driers are hopeful that it will last for some time. However, some customers report that the pen comes dried up and is useless.

"...the material sticks to the end of the knife blade OK, but it very quickly starts drying and develops a "skin" that tends to prevent it from flowing..." Read more

"...The paint will self level and dries quickly. Allow the paint to completely dry before reassembly...." Read more

"...It was not really easy to use as it dried up constantly. But in the end it saved our favorite remote." Read more

"I purchased this to repair a remote control's button. The ink dried within minutes and the repair was complete...." Read more

18 customers mention10 positive8 negative

Customers are mixed about the conductiveness of the adhesives and sealants. Some mention that it is highly conductive, while others say that it's not conductive and doesn't apply to PCB boards.

"...Saved me hundreds of dollars!The material flows pretty well once you get the hang of it...." Read more

"...the multi-meter did not detect any amount of conductivity...." Read more

"Highly conductive...." Read more

"...It doesn't actually seem to be conductive at all. Maybe I got a bum pen but I can't make it do anything" Read more

16 customers mention6 positive10 negative

Customers are mixed about the quality of the adhesives and sealants. Some mention it's good quality, reliable, and an excellent product, while others say that it broke down after a short period and doesn't last long. Some customers also mention that the pen arrived broken and spilled all throughout the packaging.

"The first pen that arrived had mechanical problems that made it useless...." Read more

"...This is an excellent product and is at a reasonable price especially for me since I was basically out of options...." Read more

"...I saw that the contacts were going bad so after looking at what to do, I found out I can restore them with this pen...." Read more

"Application was key fob buttons. Material broke down after short period and then proceeded to short contacts (button) on...." Read more

27 customers mention3 positive24 negative

Customers are dissatisfied with the ink flow of the adhesives and sealants. They mention that the inking pen does not flow, the inked is not conductive, and the pen clogged almost immediately. The ink couldn't even carry a current strong enough to light a small led.

"...It can be a challenge to get the ink to flow but eventually it will.My PCB is saved thanks to MG Chemicals." Read more

"...At first, nothing came out of the pen, so I pressed the pen onto the surface and noticed the paint coming out...." Read more

"...But coating multiple times just gets the track a mess since the pen is not precise." Read more

"DO NOT BUY! I followed the instructions and after no ink came out I opened it to look for a seal...." Read more

25 customers mention0 positive25 negative

Customers are dissatisfied with the leakage of the adhesives and sealants. For example, they mention that it leaks all over the place, the liquid comes out more in blobs than a line, and the tip moves in and out ok. Some say that the pen came broken and spilled all throughout the packaging. That said, some complain that the product doesn't work as expected and that the liquid just won't come out.

"...you are trying to apply the product and it is extremely hard to squeeze the little tube. But their flux and solder are really good." Read more

"...The capacitor on the controller board had leaked and dissolved the carbon traces for the buttons, so I purchased this carbon ink to see if I could..." Read more

"...for a very long period of time, I discovered that the alkaline had leaked from the batteries and eroded printed conductive strips (terminals)...." Read more

"...However, the product was very hard to squeeze out of the tube -- much more pressure than the instructions indicated...." Read more

Works great for repairing keyboard membranes
5 Stars
Works great for repairing keyboard membranes
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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Top reviews from the United States

Reviewed in the United States on December 30, 2023
Style: SilverSize: 5 mLVerified Purchase
Customer image
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.
Images in this review
Customer image
Customer image
Reviewed in the United States on October 5, 2023
Style: NickelSize: 5 mLVerified Purchase
Reviewed in the United States on February 20, 2022
Style: NickelSize: 5 mLVerified Purchase
2 people found this helpful
Report
Reviewed in the United States on February 28, 2024
Style: SilverSize: 2 mLVerified Purchase
Reviewed in the United States on July 18, 2022
Style: CarbonSize: 5 mLVerified Purchase
6 people found this helpful
Report
Reviewed in the United States on December 6, 2023
Style: SilverSize: 5 mLVerified Purchase
Reviewed in the United States on September 8, 2022
Style: NickelSize: 5 mLVerified Purchase
2 people found this helpful
Report

Top reviews from other countries

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
Style: NickelSize: 5 mLVerified Purchase
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.
Images in this review
Customer image Customer image Customer image Customer image
Customer imageCustomer imageCustomer imageCustomer image
One person found this helpful
Report
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
One person found this helpful
Report
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
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.
Images in this review
Customer image Customer image
Customer imageCustomer image
Aydan
5.0 out of 5 stars It worked well, and I was able to fix my keyboard.
Reviewed in Canada on January 23, 2022
Style: NickelSize: 5 mLVerified Purchase
Bob Fleming
4.0 out of 5 stars Electrically conductive
Reviewed in the United Kingdom on July 13, 2023
Style: SilverSize: 5 mLVerified Purchase