Mark Zimmerman

Palm Coast, FL

Motorcycle Cruiser Magazine

"For 45 years, I earned the bulk of my living twisting wrenches, and in that time I've come across more frozen fasteners and tried more types of penetrating oil than most of you have had hot meals -- and not once through all those busted bolts have I ever seen a penetrating oil that cut through corrosion better than Promech Professional Mechanics Formula Penetrating Oil.

What's in Promech? I couldn't tell you if I wanted to. I can tell you that it uses a wicking action to penetrate corrosion-seized fasteners, and that it works really well at freeing hardware seized by galvanic action, which occurs when dissimilar metals are threaded together and then subjected to moisture. It's a problem common to motorcycles, which tend to have lots of steel screws threaded directly into aluminum. I can also tell you that it seems to work equally well no matter what position the fasteners are in, a huge advantage when you're on your back trying to free that recalcitrant screw directly overhead.

Understand that Promech is not a universal rust buster/cleaner, like your typical moisture-displacing lubricants are. For starters it's far more aggressive at dissolving rust and corrosion than any over-the-counter product, and in fact needs to be used with some caution, as it can damage certain types of paint and plastic. Furthermore, Promech isn't a lubricant, although it does have some lubricating properties. Promech's sole purpose is to migrate into threads and break down corrosion that's locking things up so you can separate parts without damaging them. After using the stuff on everything from old motorcycles to not-so-new tractors for the last few weeks, I can tell you that it does that exceedingly well."

Dennis Byrne Jr. 

Clockamas, OR

Certified Master Mechanic

Tim's Automotive

"I just want to say thanks for the Promech Penetrating Oil you had sent me for testing. Here in Portland Oregon we don’t get much rust but we do get cars from the coast and they do have rusted bolts and seized parts. I had an exhaust manifold with rusted bolts that were locked up hard and would not move at all. There were 3 bolts so I soaked 2 of them with ** ******* penetrating oil, and one with Promech. I waited about 20 minutes and the one soaked with Promech was the only one I could break loose in that time. When I got the bolt out that I sprayed with Promech, it had worked almost all the way down the threads. When I got the other 2 out some time later, the other penetrating oil had only worked about a quarter of the way down the threads and they took some work to get them out.

I also had a tech, that was doing some suspension work on a car and he was having a hard time getting a bolt to break loose. He had tried *** ** ** brand of penetrating oil on it and let it sit for about an hour while he went to lunch. When he got back it still didn’t even move. He came and asked me if I had any ideas on getting it broke loose. I gave him the Promech and told him to give it a try and let it sit for about 20 minutes.

He sprayed it down and let it sit, and was amazed because he didn’t even put half the pressure on it that he did earlier and it came out with no problem. And again the Promech had worked most of the way down the threads.

Please let me know when Promech goes into full production so we can have it on our shelf because it does work really good."

Thanks again,
Dennis Byrne Jr.

Contact Info


407 South 17th Street

Clear Lake, IA 50428

Phone: (641) 357-1455