WD-40 SpecialistPenetrant with Smart Straw, Penetrant for Metal, Rubber and Plastic Threads, Locks and Nuts, Industrial Strength Fast-Acting Formula, 11 Oz.

WD-40 Specialist Penetrant did exactly what it’s supposed to do — it penetrated stuck bolts like a champ and lubricated as it went. Broke loose some stubborn parts with ease. Definitely keeping a can of this in the toolbox at all times.

Cheap, works well, way less messy than PB Blaster, and smells like regular WD-40 (for those who like that sort of thing).Way easier than coming up with ridiculous hacks to create your own penetrant, and the dual spray function does come in handy often.

Works as expected and cheaper than at any store locally

Excellent product. We used this to lubricate a door lock that was stiff and sticking. It worked quickly to resolve the problem. Easy to use and effective.

The product itself is established, dependable, and is always a great go to for those little jobs that need lubricating, loosening, or whatever. So five stars for the product.The new spray can, on the other hand, is a huge PITA. If you don't hit the sweet spot just right, you may not get any product at all. When it does work, it works well but you can't always hit it just right. In other words, the spray mechanism is more difficult than it needs to be. I did not mind the days when I had to poke the straw in myself because then it always worked. So about 3.5 stars for the nozzle itself.

The SCREEN spline on my patio was very hard and I could not remove it no matter what I tried. I found this, sprayed it on the spline and waited a couple of minutes. Using the tool that has a bent sharp end, I was able to remove the spline! This worked great and now I will be able to replace the screens.

A nut would not come off no matter how I tried to the point of accidentally stripping it. A spray of this and it came off like someone already loosened it for me.

Great for lubricating. For hand tools, I first use this, such as for pliers and wire cutters, but then I use the separate rust inhibitor spray. The rust inhibitor spray lasts much longer!