February 14, 2013

Prolong SPL100 - Review


So Prolong has a product called SPL100 which is made with something they call AMFT (Anti-Friction Metal Treatment). At first glance, it seems like a WD40 type lube, something you could spray on just about anything to make it better. The Prolong website says that it can...

lubricate, penetrate, and prevent corrosion, free sticky mechanisms, displace moisture, stop squeaks, and reduce friction and wear on all metal surfaces. It cleans and protects metal surfaces, tools or any metal equipment exposed to water or weather.

Prolong sent us a few cans and spray bottles of the stuff to try out. We've used it in a number of applications, one in particular had an interesting result.


My house is just two years shy of being 100 years old. You know how a tree trunk gets a new ring each year? My house seems to get a new squeak. One particularly unbearable one is the upper hinge at the office door. It's actually more of a voice than a squeak. "Squeak" implies a small sound. This is more like the growl of a grizzly bear. Every. Time. You. Open. The. [Expletive deleted]. Door.

I've tried wax, dry lubricant, spray silicone, and WD40. All temporary fixes, none lasting more than a couple weeks. I thought I'd add the Prolong to the list of failed products, so I put a few drops on the hinge, not even bothering to take out the pin. I gave the door a little back and forth to work the lube in and walked away.

Then a few hours later, Mrs. Tool Snob asked, "what's up with the office door?"


"It's closing...all by itself. It's never done that before."

So I went and checked it out and sure enough, the door was a) not squeaking b) moving freely c) closing on its own. The Prolong not only stopped the noise of the rubbing metal, but it also freed up the entire hinge which no product had done in the past. I had no idea that the door's natural state was to swing closed.

It has now been a few weeks and the door is still closing all by itself. It's a satisfying result and I'm interested to see how long it is before I have to juice up the hinge again. But as it stands, the Prolong has already outlasted the competition and with far better results. The SPL100 is an industrial product and something tells me that a squeaky door is on the low end of its capabilities.

Actually, as I was wrapping up this review, I reread the Prolong press release and came across this description of the AFMT....

AFMT chemically bonds to metal surfaces in the engine to generate a protective layer that prevents metal-on-metal grinding - the cause of unwanted friction and increased heat.

Cool stuff. I might never hear that door squeak again.

At Amazon

Read More in: All Reviews | Glues and Adhesives | Metalworking and Welding | Power Tool Accessories | Repair and Service

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Posted by Doug Mahoney at February 14, 2013 8:26 PM
Recent Comments

Love SPL. I use it on everything. I can relate to your story, as I had a gate on the side of my house going to my pool. It was always getting wet because of the sprinklers. I use to use the "other stuff" on it once a month to keep it from squeaking. I hit it once with SPL100 over a year ago and have not touched it since. Good stuff.

Posted by: Jocko Apex at February 25, 2013 6:54 PM
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