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Silicone spray for uPVC windows

Updated: 23 October 2026

The patio door needs a shove, the casement squeaks, or the lock still feels dry. On a uPVC window that usually means the hinge, the keep or the roller, not the plastic frame. Silicone spray for uPVC windows is the light film installers name for that hardware, and a poor match for a dropped sash. This page follows UK fitter aftercare and the notes behind our [silicone spray comparison](/hub/fillers-adhesives-and-sprays/silicone-spray). Prices are GBP from amazon.co.uk. We did not lab-test a film. A qualifying purchase can earn us a commission at no extra cost to you.

The patio door needs a shove, the casement squeaks, or the lock still feels dry. On a uPVC window that usually means the hinge, the keep or the roller, not the plastic frame.

Our top picks

3-IN-ONE 3-IN-ONE silicone spray 400 ml

Best overall

3-IN-ONE 3-IN-ONE silicone spray 400 ml
9.2/10about £9.78
View offer
Everbuild Everbuild silicone spray 400 ml

Rank 2

Everbuild Everbuild silicone spray 400 ml
7.4/10about £8.00
View offer
Soudal Soudal SP400 400 ml

Best value

Soudal Soudal SP400 400 ml
8.8/10about £6.46
View offer
On this page
  1. 1.Why the hinge got stiff
  2. 2.Where the spray goes
  3. 3.How often, and how little
  4. 4.When a spray will not fix it

Why the hinge got stiff

Hinge pins, keeps and patio rollers pick up dust, and a thick oil makes that dust stick. Safestyle’s aftercare says use a silicon or PTFE spray and avoid heavy oil and ordinary WD-40. Their spelling is silicon. They mean a light lubricant, not bathroom sealant and not a penetrant left in place. Academy Windows say silicone spray, not WD-40, and do not dismantle the hardware. SparWindows allow WD-40 only to free a seized part, then silicone afterwards. A film will not restore cracked or flat rubber. Wipe the pin and the keep first. Distance and the paint warning are in how to use silicone spray.

Where the spray goes

Put a small amount on the hinge pins, the lock keeps and the rollers you can reach without soaking the track. Safestyle say a small amount, then a wipe. Too much streaks the uPVC. Do not strip a multi-point lock. Academy Windows say not to dismantle the hardware. 3-IN-ONE’s UK page names uPVC windows and doors. A mist in the track collects grit. If the roller is oval or split, spray will not replace the wheel.
3-IN-ONE 3-IN-ONE silicone spray 400 ml

Testsieger

3-IN-ONE 3-IN-ONE silicone spray 400 ml
9.2/10about £9.78
View offer

How often, and how little

Safestyle suggest once or twice a year. Academy Windows say about once a year. SparWindows say twice a year on hinges and locks. Those are installer intervals, not a measured life for one can. Clean first, and use less than you think. One 3-IN-ONE review reported white residue on metal window hinges. That is one report among 2,383 ratings, not a rate, and not a Soudal figure. Spray the pin, not the foiled face. If the straw is missing, wipe the film on with a cloth.

When a spray will not fix it

A dropped sash shows a wider gap at one corner, bolts that miss the keeps, or a rub in the same place every time. Silicone will not lift the sash. If you have cleaned, filmed, wiped, and the lock still misses, stop. A broken stay, a cracked roller or a bent multi-point lock is the same stop. If you are buying a can, 3-IN-ONE at £9.78 is the top pick here for PVC doors, with 4.6 from 2,383 reviews. Soudal SP400 at £6.46 is the best value. Who should skip each one is on the best silicone spray page. Fuchoi’s mould release is the wrong row.

Common questions

Should I use silicone spray or WD-40 on uPVC hinges?
Use a silicone spray, or a PTFE spray if that is what your installer specified, and leave ordinary multi-purpose WD-40 off the hinge as a lasting lubricant. Safestyle, Academy Windows and SparWindows all steer owners away from leaving WD-40 on uPVC hardware because dust sticks to the oil. SparWindows allow it only to free a seized part, then silicone afterwards.
How often should I lubricate uPVC window hinges?
About once a year, or twice. Safestyle say once or twice a year, Academy Windows about once a year, and SparWindows twice a year on hinges and locks. Treat that as aftercare, not as a measured life for one brand. A door in heavy daily use belongs at the more frequent end.
Do I spray the lock as well as the hinges?
Yes, the keeps and the bolts you can see, with a small amount, then a wipe. Do not take the espagnolette out of the door. If the handle turns and the bolts miss the keeps, that is a dropped sash or a damaged lock, and it needs a fitter.
What if the door still will not lock?
Stop spraying. A thin film on a clean hinge and keep is the DIY step these aftercare pages support. If the door still will not lock, the sash may have dropped or a stay may be broken. More silicone will not pull a bolt into a keep it no longer meets.
Will silicone spray mark a white uPVC frame?
It can streak the frame if you use too much, which is the warning on SparWindows’ page, so you spray the hardware and wipe the face. One 3-IN-ONE review in this comparison mentions white residue on metal window hinges. That is one report, not a failure rate. Keep the film off the sash with a straw or a cloth, and wipe any mark while it is fresh.
Which can do reviewers use on PVC doors?
In this set, 3-IN-ONE’s 400 ml listing is the one whose reviews include sticking PVC doors, window runners, patio rails and locks, at £9.78 with 4.6 from 2,383 reviews. Soudal review notes also mention hinges, locks, bifolds and patio doors, including fitters’ advice. Those are comments, not a controlled trial. The water-based Fuchoi mould release is the can to skip for this job.
Is grease better on a patio roller?
A roller axle you can reach may hold a little grease, or a wiped silicone film, better than a mist that fills the track. Installers still specify silicone for hinges and locks, not a packed track. If the roller is worn or split, neither grease nor spray replaces the wheel.

Related pages

Silicone spray or multi-purpose oil

Silicone spray

Best silicone spray picks for UK hinges and moulds

Silicone spray buying guide: lubricant or mould release

How to use silicone spray: distance, wipe and brakes

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.

  1. Soudal UK technical data sheet, 20 April 2022 (retrieved 20 October 2026)
  2. 3-IN-ONE UK silicone lubricant (retrieved 20 October 2026)
  3. 3-IN-ONE professional technical data sheet (retrieved 20 October 2026)
  4. 3-IN-ONE safety data sheet, 26 September 2022 (retrieved 20 October 2026)
  5. HSE COSHH assessment (retrieved 20 October 2026)
  6. GOV.UK hazardous waste disposal (retrieved 20 October 2026)
  7. L&S Engineers, maintenance sprays explained (retrieved 20 October 2026)
  8. Warwickshire County Council, aerosols (retrieved 20 October 2026)