MG Chemicals 842AR-PS Silver Conductive Pen, 2 mL (3.65 g)

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.

Although the ink is conductive and fairly low resistance, it flows terribly. This comes down to two factors. The thickness of the ink, and the design of the pen. There are literally children's products that work better than this. In fact you could do better with an alcohol ink that you buy at a craft/hobby store. The ink probably won't be quite as low resistance, but at least you can write with it. The lines are way too thick, the ink is goopy, and flows terribly. And using this for any kind of circuit testing or prototyping on paper is laughable.

Perfect for shorting GPU Power regulation

The product itself absolutely works. Based on my experience, I suspect anybody who claims otherwise had a technique issue. Because the pen itself is a pain in the butt to use, produces a relatively thick line, and has every bit of the problem with rollerball pens that use thick inks. Add the necessity to press the bulb to get the ink to flow at all and it's not a recipe for ease of use. I took a point off for that, but the product self is working for my use case (repairing the traces on a flex ribbon cable for a 35-year old IBM Model M keyboard) so four stars for that. If you have a steady hand with a fine detail brush and can get a pot of the ink that might be a better way to go. Or perhaps a sacrificial dip pen.

I had an Industrial HMI (Red Lion G303) with a row of keys that were not responding, so instead of junking it, I disassembled it and found corroded traces on one of the PCB plastic sheets. I cleaned off the corroded traces and drew on a replacement silver trace and it fixed it! Note that I initially tried to do this with the cheaper carbon pen, but this didn't work. So I then bought the silver pen, which worked. So in all, I paid $40 (2022 prices) for 2 pens, and really only used them to draw a few inches. Still worth it, because the HMI itself is worth several hundred dollars, and at the time were backordered from covid supply chain issues.

I wasn't pleased with the 2ml pen. I could not get the agitator to work properly. The contents appeared to be dry. I added a few drops more acetone to the pen solution but couldn't get a proper flow. Addenda. A few days after adding a few drops of acetone which finally permeated the silver solution the pen flowed as advertised. Now knowing how to thin the solution, I would buy this product again.

I love the brand but this is a very bad product. The paint clumps up in a second, it doesn't draw a smooth line and you have no chance to touch it up. If you go back and try to fix anything it will clump up the spot. Get it right the first time every time and maybe if you are really really lucky you can get an ok result. The metal tip hurts the material 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.

Excelente

War zwar etwas eingetrocknet konnte aber mit etwas Aceton wieder flüssig gemacht werden. Danach sehr gut geflossen. Nach dem Trockenen hatte ich wieder einwandfreien Kontakt von vorher defekten Leiterbahnen

Needed to repair contacts on a couple remote controls for our ultra magic beds. New ones are about $250 each so this made for a cheap fix. They work well now.

No es para cualquiera, pero debes de saber cómo aplicar el producto , para realizar trabajos es muy bueno , perfecta conductividad y muy bueno porque lo ocupo para trabajar las membranas de los hornos de microondas y ninguno tuvo falla ... Todo muy bien ,comprare otro 👍

Used to replace a track on the pcb of my cooker hood. Couldn’t source a new pcb as they are no longer produced. Easy to use. Started writing straight away. Now have a working cooker hood.

Easy to apply and conductive. It's not metal conductive since it presents tents to hundredths of ohms resistance but gets a small repair done