4 ms·

It's a solvent and a penetrating oil. It works for cleaning, getting something unstuck, or making sure something has no water on it (the "WD" is for "Water Disp

It's a solvent and a penetrating oil. It works for cleaning, getting something unstuck, or making sure something has no water on it (the "WD" is for "Water Displacement"). But it evaporates quickly and that's not good for anything you want to stay lubricated. It's okay for getting a rusty bolt moving because it's thin and easily gets where something thicker would not. It's not suitable for machinery that needs oil permanently on it. Also not good for locks, since it tends to gum them up. In general if you need to lubricate anything important, you should look into what the official documents recommend. The right lubricant varies a lot depending on the application. Some stuff uses thin oils. Some uses sticky oils. Some wants grease. The right thing to use depends on things like manufacturing tolerances, the presence of oiling systems and the operating environment, so best to just check the manual.

acd10j 5y ago
I have used WD40 plenty of times to clean and lubricant rusty locks, in my opinion it works better then most other lubricants out there. And No my lock did not had manual about right lubricant.
- skeeter2020 5y ago
  you're using it to help break a stiff or rusty lock, but it's not lubricating anything.
- rtikulit 5y ago
  Many years ago I tried Super Lube® Multi-Purpose Synthetic Lubricant for locks exposed to weather 24x7, including one that spends 3 months a year buried in snow, and it is far superior to WD-40, as in multiple years of smooth operation without further maintenance. I might clean a lock with WD-40, but i am always going to lubricate outdoor locks with Super Lube. I have no idea if it works so well because of the base oils or the teflon additive or the combination, but it is really good stuff. This summer I used it to rehab my rusted grindy 38 year old Swing-A-Way can opener, which is now butter smooth, and to fix a seized outdoor A/C condenser fan. For both I had no direct access to the bearings and had to flood Super Lube down the shafts. Worked amazingly well.

acd10j 5y ago

I have used WD40 plenty of times to clean and lubricant rusty locks, in my opinion it works better then most other lubricants out there. And No my lock did not had manual about right lubricant.

skeeter2020 5y ago
you're using it to help break a stiff or rusty lock, but it's not lubricating anything.
rtikulit 5y ago
Many years ago I tried Super Lube® Multi-Purpose Synthetic Lubricant for locks exposed to weather 24x7, including one that spends 3 months a year buried in snow, and it is far superior to WD-40, as in multiple years of smooth operation without further maintenance. I might clean a lock with WD-40, but i am always going to lubricate outdoor locks with Super Lube. I have no idea if it works so well because of the base oils or the teflon additive or the combination, but it is really good stuff. This summer I used it to rehab my rusted grindy 38 year old Swing-A-Way can opener, which is now butter smooth, and to fix a seized outdoor A/C condenser fan. For both I had no direct access to the bearings and had to flood Super Lube down the shafts. Worked amazingly well.