Master Lock PTFE Lock Lubricant, Non-Toxic and Biodegradable Lock Lubricant, 0.25 Fluid Ounces, 2300D

Well.I bought my little tube in 2015 (yes, almost 4 years ago), and I've been using this occasionally over the years, more as a preventative measure than anything else.Yesterday's events have encouraged me, however, to write a positive review for it.A Master lock on my property has been locked outside in the South Florida elements for at least several years, and during that time, not only did it go through Hurricane Irma, but it never got used (i.e. unlocked).Yesterday I needed to finally unlock it, and just as I feared, it was rusted shut. Although the key went in, it wouldn't turn a bit. I didn't want to wait, and I really didn't want to shell out $$$ and buy a bolt cutter, so I did some research, and went back there again with this little tube and a hammer. Greased up the holes, waited, banged the lock, jiggled key in lock. Repeated several times, and voila! it worked. The lock still isn't working buttery smooth, but who cares, I got it off.Don't know what's in this lubricant exactly, but it sure loosened up the rusty insides of my Master Lock, giving me access and saving me $.The lubricant i have is actually so old now that it's not even that runny, and the label is cracking too, but it still worked like a charm, and really proved itself too. :-DSo,I'm here to buy another tube after yesterday's events, and although $5 for this little thing sounds expensive, for me that has worked out to be $1.25 a year on 3-4 padlocks, for saving me a lot of backyard sweating and cussing (which I do enough anyway), and emergency trips to the local home improvement store, so it's worth it!Also, I don't know if regular corn oil would have worked just as well, but this lubricant specially made for locks claims it has "PTFE" so I dont want to use regular cooking oil or WD-40 and ruin perfectly good locks or make a bad situation worse.That's a picture of my old lubricant, the lock which came off with its help, and the q-tips I'm using to clean out its insides, showing all the rust.Recommend.

It is a tiny squeeze container shaped like a pen. One lock may use 10% of the lubricant. If you use it once or twice a year on a couple of locks/doors, then it may last you 3-5 years. It is for light use.That said - application is so easy. Could not be better. The applicator tip fits easily in the lock. Squeezing out a couple of drops is a piece of cake. The stiff/frozen/problematic lock now works like new. Perfect for front door locks in cold/dry climates. It even packs up well, a black plastic tip and a clear top case. No spilling. Safe to store.Great to have one around home or office. Prefect for tool box (next to plumbers tape) or kitchen junk drawer (by a multiuse screw driver).Note: We were not compensated in any way for this unbiased review. No one should be.

I noticed a gate padlock I put on a year ago was getting a little rusty, so after some research, and watching their video on how to use it on YouTube, I did as instructed. You basically apply a few drops at both ends (key end and hasp end) and then turn the key, work the hasp in and out, and spin the hasp around a bit, and the lock is well lubricated.What I absolutely didn't like about this was the plastic tube it comes in. It's meant to be like a pen with a pen-type clip, with a plastic tube body and cap. The problem was it wasn't easy to open or even to tell how to open it until I slide the clip and started squeezing and pulling. I was ready to just cut it open when it finally gave, but it wasn't intuitive. That could be improved, but the product worked great.

Keeps all my Locks operating perfectly, a small amount goes a Long way. My lochs work very smooth after one application.

My key got stuck in the gate lock. There were dust storms and the dust got into the lock. My key would not go in all the way. With this, my key goes in easily. It is like a new lock

The lock on our security screen door was so bad, we had to wrestle with it every time we unlocked it. Used Masterlock Lubricant, and Presto! It's like a brand new lock. And, the seatbelts in our car were jamming up horribly. Had to fight and fight to get them unhooked. Put some of this into the clasp, and immediately, they popped right apart when removing them. Fabulous product, I ordered a second one to keep on hand.

I experienced a problem trying to get into dry puck-style high-security Master trailer locks when the weather hit sub freezing temperatures. The locks just didn't want to open at 20 degrees. With locks you have to be careful not to apply the wrong lubricant. WD-40 is not a lubricant, it is a water displacing agent designed to prevent rust, so you should never use that in a lock, and silicone and other lubricants can leave a sticky residue that will attract dust and gum up your lock. Master also recommends not using dry graphite lubricant in these locks. Master Lock PTFE is a very light weight oil with Teflon(R). I oiled the shackle and the keyhole with this lubricant and now the lock always opens smoothly the first time, without having to torque the key, in any weather, and at any temperature, even down to 10 degrees F, and maybe lower, (it just hasn't gotten colder than that in Maryland this winter).