Siezed caliper bolts

I agree. 90% of the time the fluid doesn’t make it far enough to help. It just makes a mess to work with.

The best I’ve used was Kroil, it was engineered to be a very thin to creep.
A local gunsmith told me about it. It works great in that application, as a lot of firearms have small screws.
When those small screws get stuck, you either mangle the head or break the screws off. And heat is the last option as it can damage the finish.

I don’t use it much. As the stuff is expensive.
Plus, I’m impatient. I don’t got time for waiting. I reef on it and cuss at it. It eventually comes apart.

 

If I get PB blaster for free and am working on a car with little to no rust then I might use it

if it’s serious, then something better like Kroil
The drawback of Kroil is it smells a lot. Like stinking up the garage or shop with it. Better to do at the end of the day or outside letting soak overnight.

speaking of PB blaster I had a can in a plastic storage tub that just leaked and filled the bottom of it.

Home Depot sells PB blaster
Good hardware stores have other stuff like Kroil

some people recommend mixing ATF and I believe Acetone 50/50, but a can is simpler

 

Ed's Red is the real deal- ATF, Acetone, and Kerosene. Used by old school gun nuts, also creeps deep and leaves a nice film. I keep it around.

https://www.hensleygibbs.com/edharris/articles/EdsRedRecipe.htm

 

I've had good luck using Superzilla.

https://superzilla.us/

 

What about the Bolt Buster?

 

That would probably work too.
But the average guy DIYing in his garage, probably doesn't have one.
And they are kind of expensive. That is a 12mm bolt (17mm head). It will break free with a good shallow 6-point, you just have muscle it.

 

I used to work on and repair Induction Heaters in an industrial environment. Note: They tend to be high maintenance and high cost items to repair.

** This may have changed since then, but it has only been ~ 6 years ago. Note: I'm not discussing this particular device as I have not used it...

Nothing wrong with a good old fashioned Propane Gas or MAP Gas torch...

 

Working on a 2011 tacoma from the midwest, I would say they are almost as necessary as a ratchet.