Supco MO44 Rust Buster Liquid Penetrating Oil

Bought this because of frozen prop shaft stuff box and within less than a hour I was able to easily break apart the the nut from the shaft housing. I give it an A+

I had two rusty hinges on a ramp for a trailer. I Used this on both. One hinge came loose in a matter of 15 minutes. The other hinge required several applications more and finally heat and a mallet to loosen the 2nd hinge. I was kinda impressed with the first hinge loosening up so quickly.

This stuff is great!

This is the best penetrating oil I have ever used. It almost literally works miracles. I maintain building systems and there are some rusty junkpiles that need to be serviced where I work. This stuff always does the trick especially if there is time to leave it to work over night.

I’ve always kept a bottle of this in the garage, last purchase the packaging leaked about half a bottle, but it does what it says, sometimes just need to let us set for longer.

This is the best by far. Hard to find. Amazon prime!