Originally Posted by Droplynx
Agreed. I worked for a industrial distributor and learned all about these products. WD-40 its to help stop rust, not penetrate and loosen. PB Blaster is better for it, if you are still having issues - try Loctite Freeze and Release...the stuff works miracles....
Side note, working the door back and forth with the window open (as stated before) should do the trick, its what I had to do...
WD-40 was a military product when it first came out. It is called "Water Displacement formula #40". It was never meant to be a lubricating oil, just a parts cleaner and worked great on electrical gear. It's flammable but evaporates.
CLP is another great product. "Cleaner lubricant and preservative" was its military name. We all call it Breakfree now.
We used it at sea on the gun mounts to remove corrosion and salt and preserve things.
PB blaster is a great penetrating oil, but I always reassemble things with a shot of CLP.
Tomorrow I'll explain the difference between military "Duck Tape" and the cheap imitation "Duct Tape."