TCP Global Air Rust Proofing and Undercoating Gun with Gauge & Suction Feed Cup, 2 Wands - 22 Long Flexible Extension Wand with Multi-Directional Nozzle - Spray Truck Bed Liner, Rubberized Undercoat

The sprayer works as described but the lack of a cup or easily sourced cup is the reason I rated at 2-star

Undercoating

I bought this specifically because it had an extension wand so i can get to the wheel wells in the bed of the truck. If anywhere this is the worst place on trucks. I cant get the Fluid Film to go through no matter what pressure its set at. As a matter of fact the material comes out the air hole in the top of the gun. It is back-feeding the air into the can. Im trying to find a solution to this because I need to get to this area. Id be curious to hear about thicker undercoatings working with this extension.

It seemed to spray good but has a awful design for the trigger. The trigger slips to the left and right and causes it too stop spraying. If not for that it would be a great review but as for now its garbage.

I used it to rustproof the frame rails of my SUV. It performed well. The clear hose tends to come off the barb fitting. I used a small clamp to hold it on.

Picked this up to spray Corrosion Free (an oil based undercoating gel) on my truck. While it worked, I found it very frustrating to operate due to 3 issues: 1) The trigger has a ton of play, and it often slips off the plunger that actuates the airflow. Especially in the least convenient and comfortable times working on your back under a vehicle. 2) The wands do not have any clamps holding the hose on. This is easy to correct but quite silly that we have to. 3) The jar doesn’t really lock on positively. There’s three posts on the jar and three slots on sprayer. Once everything gets greasy as it inevitably does, the jar will slip past the detents and come loose as you are attempting to tighten it. There is a sweet spot but again, frustrating. But here’s the deal. The nicer gun and wand combo here on Amazon is $100. I guess I’m willing to deal with some poor design and save the $60. Because really, this is used once a year. And aside from the design snafus, it does work. I got rid of the regulator and used the one on the tank set to 90 PSI. Less bulk. I also fitted a swivel connection to improve maneuverability in tight spots. All told, with the tweaks it works okay. But it is a cheap tool and not great. I used it with my small 6 gal pancake compressor and it did take a little longer letting the compressor catch it’s breath between applications. But it goes to show you don’t need something huge and expensive to do this yourself! I am also pleased with the Corrosion Free and recommend it.

FLUID FILM DOES WORK WITH THE EXTENSION NOZZLE, it just needs to be heated first. I found a forum thread about a guy that used Fluid Film in a hand pump sprayer bottle after heating it up to make it less viscous. He can do that, then theres no reason why gun with 90PSI behind it cant work! Since so many reviews on here were saying the extension wand didnt work, I decided to try it heated. There was no problem. I used a fondue heater thats like a small crock pot. Others have heated the can of Fluid Film while submerged in a pot of water on an electric hotplate. However, you should expect only a fine mist from the nozzle of the extension. Is that bad? NO. It atomizes the Fluid Film and positively gives you a nearly spherical spray pattern. If you are under the car where its dark, you will not even see the Fluid Film coming out. Hold it up in sunlight and its pretty obvious. I suspect another issue is people spraying with the regular nozzle first and then switching to the extension wand. Since theres a huge difference in volume output between the two nozzles, I can see where someone would think the extension doesnt work. I would say it would take 3 slow passes in one spot to equal the amount that is sprayed by the regular nozzle. I have used this gun to spray Fluid Film and the HF brand of bed liner. Although I probably could have benefited from an adjustable nozzle for the bedliner, it is of no consequence for the Fluid Film. You simply adjust your air pressure and gun sweeping pattern. So if youre not doing anything that has aesthetic demands, this gun will be perfect for you. Even then, my bumper turned out just fine for someone with zero experience using an air compressor to paint something. I took off one star partly because of the false description of there being an adjustable nozzle. Its not in the least bit. Another part of the one star is the brass fitting on the end that the nozzle screws into must have had some type of thread sealant on it that made it impossible to remove without breaking the aluminum housing. I took it off so I can clean bedliner out of the orifice, and put it back on with teflon. So in that regard I do not think its easy to clean if cant be readily disassembled.

Sprayed some bedliner through it. Very little overspray, and throws a nice even coat.

This spray gun was phenomenal! I bought this to spray thick rustproofing oil under my vehicles. I use Corrosion Free Formula 3000. I know alot of people use fluid film. The corrosion free is not as thick as fluid film. It is more like a thick gel. I do warm the product up in a hot water bath prior to using. The gun performed amazingly! The wands sprayed the product out perfectly. I do have a 33 gallon compressor with high flow air fittings but i think with a decent compressor this gun should perform well. The regular nozzle blasts the product out. The 360 wand is more is a nice mist. The extention wand is somewhere in between. I had no leaks. The tubing did pop off the end of the nozzle but it pops right back on no big deal. Nothing a hose clamp or piece of shrink tubing cant take care of. The metal is light the canister goes on securely albeit there is an”sweet” spot for it when turning securing it to the gun. I hope this helps others decide if they should buy it or not. I am very happy I did.

One word to describe this product is garbage. When I was finished with it I didnt even bother cleaning and I just threw it in the garbage. The lid coming off because it has no threads on it to screw the lid on its a slide lock which keeps coming off.