You could try the ATF-acetone mix. I haven't tried it but these test results seem promising. This info has been posted before, but here it is again:
Machinist's Workshop magazine tested penetrants for break out torque on rusted nuts (April 2007).
They arranged a subjective test of all the popular penetrants with the control being the torque required to remove the nut from a "scientifically rusted" environment.
Penetrating oil ..... Average load None ...................... 516 pounds WD-40 .................... 238 pounds PB Blaster .............. 214 pounds Liquid Wrench ........ 127 pounds Kano Kroil ............... 106 pounds ATF-Acetone mix.......53 pounds
The ATF-Acetone mix was a "home brew" mix of 50 - 50 automatic transmission fluid and acetone.
Note the "home brew" was better than any commercial product in this one particular test.
Our local machinist group mixed up a batch and we all now use it with equally good results.
Note also that "Liquid Wrench" is about as good as "Kroil" for about 20% of the price.
Brian Samson Vancouver, BC, Canada
On 16-Sep-09, at 5:16 PM, Rich Pinder wrote:
> I bought a product that SEEMED to work quite well.
> It's aerosol, and has some marketting hype about 'FREEZING' the
> stuck little devil out.
> I'm a sucker for tryin new stuff - and it did work for some really
> stuck bolts (albeit they were NOT water bottle screws)
>
> I can dbl check the brand name tonite - but googlin shows this as a
> most likely similar product:
> http://tinyurl.com/
>
> Rich Pinder
> Van Nuys, CA
>
> K.R. Bennett wrote:
>> ....
>> Has anything more effective than Kroil (or as effective and more
>> readily available from retail sources) come on the scene recently?