Having never used this before I'm quite surprised how well it worked.Sprayed it every now and then on rusty seized old car suspension bolts, they came out much easier without snapping.

I used this on the lower o2 sensor that was just rust welded to the exhaust. I applied several times for two days and it released with relative ease. Just be mindful that these fluids are not a spray and go for it they need time to penatrate the rust and get into all the threads. Best I've used recommended.

I've not used this kind of penetrative oil for years but very rusted exhaust bolts called for it. Luckily I had a few days before so I "pre-soaked" the bolts and et viola, first time all 4 came out without issue because of using this product. Sure there's branded names out there that are more common but genuinely I was very pleased with the way this stuff did the job. It might be ages before it's needed again but its no ill store having it in the shed. Try it, you'll be surprised.

Does as it says

Does an extremely great job of penetrating very quickly into the most seized in bolts. This together with a good quality high torque Impact Driver got me out of a complete fix. Highly recommended.