Will this work to coat the non-working rubber buttons on a remote control

Yes, this worked great. First, clean the circuit board where the contacts are using Isopropyl alcohol. I also used Iso to clean off the rubber dot, which is usually a conductive carbon substance. Then apply the *carbon* version of this product to the black dot. Cover the whole surface and let it dry completely before re-assembling.

Can this be used to repair a broken strip in a car rear defogger?

I just tested a 1/2" long x1/8" wide strip on a piece of pyrex glass and got 0 resistance for that length. It seems to conduct well for a short distance and stuck to the glass very well. I hope this helps.

Does it work for making a PCB?

In my opinion, it's far from the ideal for making your own PCB. I can see it being used for prototyping of low voltage/low current circuits.This particular compound is based on nickel, which is not a as conductive as copper.This pen would work fine for the small repairs like cuts or tears in the existing PCB traces. BTW, there's a more conductive version of this pen which is based on silver.Aside from conductivity issue, there's an issue of securing parts to PCB. I,also, doubt you can solder to the trace drawn with this pen.

Is this pen good for making a jumper on a circuit board?

Yes, it's great for that but even the carbon conductive (lowest quality) pen would work for that

Mg Chemicals 838ar P Total Ground Carbon Conductive Pen 4g

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

⚡ Draw the future of connectivity — fast, precise, and unstoppable!

FAST DRYING FORMULA SAVES TIME - Dries quickly at room temperature, accelerating your workflow without compromising durability.
VERSATILE ADHESION ACROSS MATERIALS - Bonds seamlessly to plastics, metals, ceramics, wood, and even 3D printing substrates like ABS and PLA.
PRECISION APPLICATION WITH VALVE TIP - Control flow and create clean 1.0 mm conductive traces effortlessly, ideal for detailed electronic repairs and projects.
CORROSION RESISTANT CARBON BLACK PIGMENT - Provides long-lasting, stable conductivity resistant to environmental wear and tear.
ULTRA LOW RESISTIVITY FOR RELIABLE CONDUCTIVITY - Ensures efficient electrical connections with ≤0.5 Ω·cm volume resistivity, perfect for professional prototyping.

The MG Chemicals 838AR-P Carbon Conductive Pen delivers a fast-drying, low-resistance conductive paint in a convenient pen format. Engineered with high-purity carbon black, it creates durable, corrosion-resistant conductive traces on a wide range of substrates including plastics, metals, ceramics, and 3D printing materials. Ideal for prototyping, repairs, and Maker projects, it offers precise control with a valve tip and dries quickly at room temperature, making it a must-have tool for professionals seeking reliable electrical connections on the go.

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ASIN	B01LZX06PL
Best Sellers Rank	#132,287 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #661 in Multi Testers
Item model number	838AR-P
Manufacturer	MG Chemicals
Product Dimensions	7.62 x 2.54 x 20.32 cm; 11 g

MG Chemicals 838AR-P Total Ground Carbon Conductive Pen, 4g, Carbon Black

Description

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Common Questions