Roofing cement works great, to keep water out of locks. Have to put some on with a trowel, and then fiberglass, and then more roofing cement. Works nicely. You just have to remember to only do the drivers door, and always get in the other side.
I have used MMO for stubborn locks. I have also used the DuraLube zip oil - to get them working. For use out in the cold - like the padlocks on the storage container and locks on the hangar gates I wash all the oil out with brake cleaner and shoot in the LockEase (after making sure they are working smoothly while oiled) A rubber flap over the lock to keep water out goes a long way towards keeping padlocks working in the winter. Keyed knobs that are used infrequently can be weatherproofed with an old rubber glove stretched over them.
Mixtures of different lubricants quite often cause problems with gelling or forming solid "gunk". WD 40 ALWAYS ends up going sticky - and so does a lot of 3 in 1 oil.
Yes. I worked in the automotive service business for half my life, and sticking locks were always an issue. I always had a bottle of Lock-ease in my tool box, and usually another in my glove compartment to look after locks when I wasn't at the shop. That was one of the many services I as a service manager offered without writing out a workorder, which drove the dealer principal nuts. He thought I should charge for everything - he reluctantly agreed when I showed him a workorder, from printing, through writing up, through to final processing cost him twenty five bucks, so even a fifteen dollar work order was costing him ten bucks.
I believe WD-40 used to be Stoddard Solvent, mostly. Maybe they changed the formula, or maybe the now describe Stoddard Solvent with a list of chemical names.
I've got a couple of 4-ounce squeeze cans of Lock-Ease. I've probably had them since the 1960s. They say "Protects against sticking ? rust - freezing."
Because I've rarely had lock trouble, when it happens, I don't stop to remember those cans.
One day at a gas station, it took several tries to turn my ignition lock. I figured a tumbler was sticky, from lubricant or dirt. I figured a shot of contact cleaner would flush out dirt and lubricant. It worked.
I began having trouble with my trunk lock. If one day I couldn't get it to work, I figured I'd have a problem because the cable for the remote release is broken. I removed the lock and couldn't get it to work consistently with contact cleaner. I figured it had corrosion. WD-40 fixed it. I had the same experience with my gas-door lock.
Based on your recommendation, I think I'll pop those locks off and add a shot of Lock-Ease. I think I'll leave the ignition lock alone. For one thing, I don't know if it has tumblers on top. If it does, I don't know how my Lock-Ease would get them because I can't remove the lock to turn it over.
My car has had trouble with the ignition-switch contacts as long as I can remember. I couldn't remove the switch to see the contacts. Many years ago, the key would sometimes to get quite warm; so I knew there was resistance in the ON contacts. A shot of contact cleaner fixed it.
It would sometimes take more than one try to energize the starter solenoid. Contact cleaner would fix it temporarily. I hesitated to squirt WD-40 into a switch I couldn't remove in case it went wrong. Last year, I finally took the chance. It worked. No trouble since.
When the CRC556 came out WAY back in the '70s it was a "liquid miracle" There may be better products today, but I don't know what all is out there competing today.
I generally have a few cans of brake cleaner around. Sometimes I even use it on brakes. It's one of the few things they haven't dumbed down to the point where they don't work anymore.
I've got to rig one of those. Those 'weatherproof' locks from the hardware store with the plastic overcase mostly seem to retain any water. I've learned to keep the propane torch in the house so I can thaw out the shed lock to get to whatever else I need.
The first can I got was a free sample. Can't remember where and when but it was before I got my mechanics licence in Dec 1971 - Likely at a Texaco sponsored service station training meeting. For years the stuff was not readily available on Canadian shelves. Haven't bought a can for YEARS..
"Ed's Red" is a pretty good mix 1 part Dexron
1 part Varsol (stoddard solvent)
1 part Acetone Optional (and recommended) 1 lb anhydrous Lanolin per gallon.
It was originally a "bore cleaner" for guns but makes a pretty good penetrating fluid.
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