Silicone spray vs WD-40
Updated: 23 October 2026
Silicone spray vs WD-40 only makes sense once you know which WD-40 you mean. Multi-Use is a penetrant with no silicone in it. Specialist Silicone is a different can, and it is not one of the ten listings in our [silicone spray comparison](/hub/fillers-adhesives-and-sprays/silicone-spray). 3-IN-ONE silicone spray is made by WD-40 Company and it is still a silicone film. This page uses those data sheets and UK fitter notes. We did not run a soak test. Read the label before the brand name chooses for you. A qualifying purchase can earn us a commission at no extra cost to you.
Silicone spray vs WD-40 only makes sense once you know which WD-40 you mean. Multi-Use is a penetrant with no silicone in it.
Silicone spray vs WD-40 only makes sense once you know which WD-40 you mean. Multi-Use is a penetrant with no silicone in it. Specialist Silicone is a different can, and it is not one of the ten listings in our silicone spray comparison. 3-IN-ONE silicone spray is made by WD-40 Company and it is still a silicone film. This page uses those data sheets and UK fitter notes. We did not run a soak test. Read the label before the brand name chooses for you. A qualifying purchase can earn us a commission at no extra cost to you.
Our top picks
| Badge | Product | Maker on the listing | What the can is | Materials named | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Liqui Moly Liqui Moly 3310 300 ml | Liqui Moly | Silicone spray | Plastics and rubber | 8.0 | about £10.95 | View offer |
 3-IN-ONE 3-IN-ONE silicone spray 400 ml | WD-40 Company | Silicone lubricant | Rubber, plastic, wood, vinyl, metal | 9.2 | about £9.78 | View offer | |
| Best value |  Soudal Soudal SP400 400 ml | Soudal | Silicone aerosol | Doors, windows, worktops | 8.8 | about £6.46 | View offer |
On this page
Two cans, one famous name
WD-40 Multi-Use is a petroleum distillate. Silicone is not an ingredient. It displaces moisture and creeps into a seized thread. It is not the film fitters want left on a hinge. If the front does not say silicone, you are holding that penetrant.
Specialist Silicone quotes about −35 °C to +200 °C and mentions NSF H2. It is not an ASIN here, so it has no price. Do not paste that range onto Soudal or 3-IN-ONE. 3-IN-ONE, part 44015, is made by WD-40 Company and is still a silicone film, the top pick for uPVC hinges. Prices sit in the silicone spray buying guide.
Rubber seals
Practical Motorhome says use a silicone lubricant on a stuck window rubber, wiped on, not WD-40 Multi-Use. The Multi-Use sheet says some rubbers can swell on prolonged immersion, and that clear polycarbonate and polystyrene may craze. That is not the same as one short spray destroying every seal.
A light wipe of silicone on a clean door rubber is the usual recommendation when it sticks in cold weather. It will not rebuild a perished seal. If you have already soaked a rubber in Multi-Use, wipe it off. Keep both products off anything you intend to paint.
Hinges, locks, and a stuck bolt
For a dry, dusty uPVC hinge, installer pages want silicone, not Multi-Use left in place. Safestyle say dust sticks to the oil. SparWindows allow WD-40 only to free a seized part, then silicone. L&S Engineers say a penetrant frees and a silicone spray keeps light parts moving. The routine is in silicone spray for uPVC windows.
A rusted bolt is the penetrant’s job. Do not leave that heavy oil on a uPVC keep. A hinge that only squeaks does not need a penetrant. Soudal SP400 is the best value among the silicone cans, at £6.46.
When neither spray is the right can
Do not put Multi-Use or silicone spray on a brake disc, drum or pad. Soudal excludes brake drums and discs. A noisy brake needs an inspection. Do not spray either can where you will paint or glue. NSF H2 means food contact is not intended. It does not cover a chopping board. Keep silicone off pedals and steering wheels.
If you already used the oil on a hinge, wipe it, let it dry, then put a thin silicone film on the pin. If a rubber has swollen after a long soak, replace the seal.
Common questions
Will multi-purpose WD-40 hurt a door rubber?
The Multi-Use sheet says some rubbers can swell if they are immersed for a prolonged time. That is not a one-second spray destroying every seal. Practical Motorhome still says use silicone, wiped on, for a stuck window rubber. Wipe off oil you have already put on the seal.
Is WD-40 Specialist Silicone the same as Multi-Use?
No. Specialist Silicone is a silicone lubricant, about −35 °C to +200 °C, with an NSF H2 note. Multi-Use is a petroleum distillate with no silicone in that product. Specialist Silicone is not one of the ten listings in our comparison, so it has no price on that table.
Which one do I use on a seized bolt?
Use a penetrant such as WD-40 Multi-Use on a seized thread, then work the bolt. A silicone spray is a film for parts that already move, not a creeping oil for rust. Once the bolt is free, wipe the heavy residue on a uPVC hinge and leave silicone only if you still need light lubrication.
Which one is for a uPVC hinge?
Silicone spray, in a small amount, after the hinge is clean. Safestyle, Academy Windows and SparWindows all prefer that to leaving ordinary WD-40 on the hardware, because dust sticks to the oil. SparWindows allow Multi-Use only to free a seized part, followed by silicone. 3-IN-ONE’s silicone listing is in that silicone group even though WD-40 Company makes it.
Which one is for a rubber that sticks in frost?
A silicone lubricant, wiped on with a cloth, is the recommendation Practical Motorhome gives for a stuck rubber seal, not Multi-Use. Use a little, then wipe, so the seal does not stay wet and hold grit. Silicone will not repair a perished or split gasket. If the rubber has already been soaked in penetrant and has swollen, replace it rather than adding another coat.
Does either spray belong on a brake disc?
No. Do not spray Multi-Use or silicone lubricant on a brake disc, drum or pad. Soudal’s silicone instructions exclude brake drums and discs, and a penetrant does not become acceptable because the job is urgent. A brake that squeals or binds needs a brake inspection. Household aerosols are for hinges, seals and similar light parts, not for friction surfaces.
What should I do if I already used the oil?
Wipe off what you can reach and do not add more Multi-Use as the cure. On a uPVC hinge, a thin silicone film can go on the pin once the heavy oil is gone. If a rubber has swollen after a long contact, replace the seal. Do not paint over the residue.
Related pages
Sources
Public UK sources used for this comparison. amazon.co.uk prices, stars and review counts were taken from the listings stored for 19 October 2026. A 20 October 2026 spot check is noted for one can.
- Soudal UK technical data sheet, 20 April 2022 (retrieved 20 October 2026)
- 3-IN-ONE UK silicone lubricant (retrieved 20 October 2026)
- 3-IN-ONE professional technical data sheet (retrieved 20 October 2026)
- 3-IN-ONE safety data sheet, 26 September 2022 (retrieved 20 October 2026)
- HSE COSHH assessment (retrieved 20 October 2026)
- GOV.UK hazardous waste disposal (retrieved 20 October 2026)
- L&S Engineers, maintenance sprays explained (retrieved 20 October 2026)
- Warwickshire County Council, aerosols (retrieved 20 October 2026)