How to use graphite powder on a lock
Updated: 23 October 2026
The key still fights you after a wet morning, and the puff bottle is already in your hand. How to use graphite powder on a lock is a small dry dose on a cylinder the maker allows, then the key, then a wipe. It is not a fix for a snapped key. If the leaflet bans graphite, stop before you open the cap. The ranked listings are the [graphite powder comparison](/hub/diy-supplies/graphite-powder). Peter F. did not service a lock for this page. A qualifying purchase can earn us a commission at no extra cost to you.
The key still fights you after a wet morning, and the puff bottle is already in your hand. How to use graphite powder on a lock is a small dry dose on a cylinder the maker allows, then the key, then a wipe.
The key still fights you after a wet morning, and the puff bottle is already in your hand. How to use graphite powder on a lock is a small dry dose on a cylinder the maker allows, then the key, then a wipe. It is not a fix for a snapped key. If the leaflet bans graphite, stop before you open the cap. The ranked listings are the graphite powder comparison. Peter F. did not service a lock for this page. A qualifying purchase can earn us a commission at no extra cost to you.
Our top picks
| Badge | Product | Applicator | Grease-free claim | Use | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Kasp Kasp K30050 pack of 2 | Fine dispensing spout | Greaseless and odourless | Door locks and padlocks | 8.8 | about £10.70 | View offer |
| Alternative |  Lution Lution XM lock lubricant | Bottle; reviews mention a spout | Bullets say no need for oils or WD-40 | Ultion locks, on the bullets | 8.5 | about £11.80 | View offer |
| Best value |  Pressol Pressol graphite 50 g | Nozzle described in reviews, not named on the title | Yes, on the title | Grease-free graphite; reviews focus on locks | 7.7 | about £5.17 | View offer |
On this page
Check the lock before you open the bottle
Read the cylinder leaflet before you puff. Ultion's page and the Lution XM bullets tell you to use their graphite and not oils or WD-40, about every six months on a well installed lock. Avocet's ABS powder page tells you to dust lightly, about every six months, and about every three months on the coast, and not to use WD-40 or 3-in-1. APECS tells you not to use graphite at all. Those intervals are maker instructions, not a UK law.
If the keyway is wet, oily, or already black with an old spray, do not add graphite on top. That chemistry is on graphite powder vs WD-40. If the key is snapped, the cylinder spins, or you suspect the multipoint hooks, call a locksmith. Safestyle's stiff-lock note says not to force it.
A small dose, then the key
Put a cloth under the cylinder. The powder stains, and it is slippery. Hardwick's Sentry+ instructions are two short bursts into the keyway or onto the key, then turn the key fully several times and wipe the face. Avocet's powder page is a light dusting on the key cuts, then insert and rotate, and do not keep adding powder. Safestyle says a nozzle in the lock and a little on the key.
Use one small dose, then the key. Do not repeat the squeeze in the same session. More powder packs the keyway.
Wipe, cap, and the messy nozzle
Wipe the faceplate, the key, and the floor. Store the bottle upright with the cap seated. UK reviews of Kasp, Pressol and Lution repeat an open or unscrewed cap in the parcel. A blocked nozzle is common in those texts. Reviewers clear the tip or cut it wider. Cutting is their workaround, not an instruction to modify a new bottle. Clear a blocked tip with a pin away from the lock, test the puff onto the cloth, and only then go back to the keyway. Do not stab the spout into the cylinder.
When powder is the wrong next step
Stop if you have already sprayed a water-displacing oil into the keyway. Graphite on that film makes a grinding paste. Home Secure says not to add graphite on top of oil. Do not wash the oil out with more spray. Stop for a snapped key, a spinning cylinder, visible ice, and any smart lock. Stop if the only powder in the house is Cretacolor's drawing tin or a 500 g bag. An open tin dumps a pile. A bag has no spout. Use a lock puff, lightly, or none.
Common questions
Should the powder go on the key or in the keyway?
Both appear in maker notes, and they are not equal. Hardwick allows two short bursts into the keyway or onto the key. Avocet dusts the key cuts, then you insert and rotate. A spout you can aim into the plug wastes less than a loaded key, which Kasp reviewers say drops powder on the door. Use one light dose by the route you can control, work the key fully, and do not do both routes as two full doses in the same sitting.
How many puffs should I use?
Use the small count on the product you actually bought, if it prints one. Hardwick's page says two short bursts. Home Secure says one or two squeezes. Avocet says a light dusting and tells you not to keep adding powder. None of those sentences is a licence to empty a 50 g bottle into a euro cylinder. If the first small dose does not help, stop. More powder in the same session packs the keyway.
How often should I graphite a lock?
Follow the sheet for that lock. Ultion, Hardwick and Avocet print about every six months. Avocet's coastal line on its powder page is about every three months. Hardwick says sooner if its lock is exposed. Those are maker instructions, not a general UK law. A lock that stiffens every week needs a look at wear, alignment or old oil, not a monthly top-up of dust.
What if I already used WD-40?
Do not add graphite on top. The oil film holds grit, and powder stuck in that film is worse than either product alone. Leave the cylinder, tell a locksmith what you sprayed, and do not try to dry it out with a hairdryer or another aerosol. If the maker is Ultion, their page is also where the guarantee language about oils and WD-40 lives. Read that before you assume a later puff repairs the can.
The nozzle is blocked. Should I cut it?
Clear a blocked tip away from the lock, onto a cloth, with a pin if you can. Cutting the nozzle wider is what some UK reviewers of Kasp, Pressol and Lution did after a clog. It is their workaround, not a modification we recommend for a new bottle. A wider hole is harder to dose. If you cannot clear the tip, buy a bottle that puffs, or stop. Do not push a broken spout into the keyway.
Can I use a pencil instead of powder?
Safestyle mentions a pencil rub only as a stopgap, and it still says not to force the key. A pencil is a thin smear of graphite, not a measured lock puff, and it does not override a maker who bans graphite. It will not free a snapped key. If the lock is allowed a dry lubricant and you have the proper puff, use a small dose of that.
Related pages
Sources
Public UK sources and the amazon.co.uk listings compared on this page. Listings captured 21 October 2026. Updated October 2026.
- HSE EH40/2005 workplace exposure limits (retrieved 21 October 2026)
- HSE COSHH (retrieved 21 October 2026)
- Inoxia graphite powder safety data sheet (retrieved 21 October 2026)
- Flints graphite powder safety data sheet (retrieved 21 October 2026)
- Ultion lock lubricant (retrieved 21 October 2026)
- Avocet ABS graphite powder (retrieved 21 October 2026)
- APECS lock care (retrieved 21 October 2026)
- Jackson's Art: graphite and charcoal (retrieved 21 October 2026)