What lock lubricant to use?

This is the stuff I use it's called Silca Anti Grip it costs under a tenner and it works very well it's a dry graphite power and it can be used in all lock types.

FWIW I've lubricated every door lock in this house for 14yr with wd40 with no issues. Graphite powder is probably what a locksmith would use, but while it will be an effective lubricant I can't see how it will protect from internal corrosian.

FWIW I’ve never lubricated a lock in my life and have also had no issues.

Edit. By this i mean i have locks and never lubricated them. Not that i dont have locks. (edited)

WD40 is sticky because it is wet and so dust and grit gets stuck to it, which is bad for it.

I used wd40 on my lock outside, when it gets really cold, the wd40 freezes and makes turning the lock very difficult.

Wet lubricants are sticky so dust/grit builds up.

Best to use the type of lubricant your instructions recommend.

The instructions for my front door lock advise to use silicone oil and not to use graphite to lubricate it because it attacks its stainless steel internals.

I used GT85 on my lock and hooks
That's what the instructions said to use
It did say don't use oil?

As some others have said wd40 is not a good lubricant, if you maintain the lock with WD40 it will likely cause more problems than using nothing at all - it's a misconception that it's a good lube.

There are many other better lubricants out there, the problem with WD40 is it will likely remove other lubricants in the lock already, it would also encourage a buildup of gunk due to the residue it leaves behind attracting debris from your key.

WD40 would be worth a try if the lock was already seized. It's good for penetrating or removing rust - but you'd ideally remove it by wiping off excess after its done its job, and then lubricating with an oil based lubricant. In the case of a lock, graphite based would be ideal.

I buy 5 litre bottles of WD40 at work, but we very rarely lubricate with it, we use at as a cleaner or to remove a seized fixing. I'm a wd40 bore.

Totally misread "lock"

Another graphite powder advocate here. When we had our external doors replaced the new locks stated that using anything other than graphite powder could void the 10 year warranty since liquids can gum up the internals and lead to seizing and premature wear.

I grabbed a 50g tube from Amazon for a fiver. Since then, I've used it on all of my external locks and it works wonders. A couple of weeks ago the euro cylinder on our garage was getting stiff to turn, I just dusted the key with the powder and inserted it a few times, now it's smooth as new.

Just be careful since it can make a right mess if you spill it, the powder is so fine it gets into all sorts of nooks and crannies.