StewMac Conductive Shielding Paint, 1/2 pint (236.6ml) – Reduces Hum, Noise & Radio Interference – Water-Based for Guitar Cavity Shielding – Easy Brush-On Application

This is a great product. Goes on nice and thick, and rings out like it should. Make sure to shake thoroughly before each use. Note: this is a graphite suspended product, and that is how you get your continuity, similar to a brushed motor. You must apply evenly and even though you do get a nice coat with just two coats, I suggest using all three coats as suggested. This will assure a lifetime of continuity, unlike copper tape that is flimsy and cheap, and a bummer to work with. This being said, copper tape is a quick turn around in a pinch, just use a quality tape with a good mil thickness.

After considering the other available alternitives, I decided to go with the Stew Mac conductive paint. They tend to be a bit pricey but if you are serious about your guitar builds, their products are always the best available for aspiring Luthiers.

Great paint for shielding. I prefer the paint over copper shielding

This is the real deal. Worth the price as it does what it is supposed to do without the hassle of messing with shielding tape. My only complaint is that it requires 3 coats, and each coat requires 24 hours between them, so if you're needing to get done quickly, this is not the solution and better to go the tape route. If you have 3 days to spend, though, this is definitely easier!

Applies great. Effective. Good product.

A friend used this to fix my bass guitar after a leak in my apartment got it wet and caused all the shielding paint on it to come off. The damage caused it to make a constant buzzing sound that was not good, and with the paint it is now as good as new.

I typically get less than 200 ohms of resistance across a large cavity following the instructions for 3 coats with 24 hours between coats. Shielding is quite good, it is expensive but works as advertised.

I picked up a cheap Squier Strat with shot electronics that I decided to upgrade. I put on a Fender Tex-Mex loaded pickguard and made some other upgrades. Once everything was was put back together, there was LOUD hum that cut in and out depending on what metal part I touched. When I touched the bridge and output jack at the same time, I literally picked up a radio signal. Yup, voices out of my guitar amp, like Spinal Tap. So I picked up this paint and painted the whole cavity. (Yes I was lazy and left the strings on.) Once everything was painted and shielded, and reassembled, the hum was gone. Even directly under a florescent light, inches from the pickups, with high distortion, no hum. This definitely works as advertised!