4 Pack Sash Jammer Blocker – Door & Window Lock Anti Theft – Additional Home Security for PVC/uPVC Windows and Doors – White
Original price was: £8.99.£8.49Current price is: £8.49.
Price: £8.99 - £8.49
(as of Jun 08, 2025 10:42:32 UTC – Details)
Product Description
What are Sash Jammers?
1. What are Sash Jammers?
Sash Jammers are commonly used as additional security to secure uPVC doors or windows and are available as locking and non-locking options.
A Sash jammer will prevent a door or window from opening should the lock be bypassed by a thief.
2. What Type of Doors and Windows Can Jammers be Fitted to?
uPVC Doors and windows
Wooden and Composite doors
Patio Doors and French Doors
Easy Operation
Comes with fixing screws and button gaskets, Sash stoppers are easy to fit with supplied fixing screws.
How many Sash Jammers Should I Fit on My Door or Window?
Single doors will normally have two sash jammers fitted – one fitted at the top and one fitted at the bottom of the door.
Small windows will only require one sash jammer to be fitted.
Patio doors and French Doors will have 4 fitted on each door, two at the top and two at the bottom.
Durable Design
Manufactured from strong cast zinc construction with durable powder coated finish. It’s Durable and steady!
What are the advantages of Sash Jammers?
Sash Jammers are a cheap way to improve your uPVC door or window security
Easy to fit
Fits most types of doors and windows
Will fit inward and outward opening doors and windows
Reversible, suitable for both left and right handed doors
Can prevent door or window from opening for any attempted break-in
Patio Door
UPVC Windows
Wood Windows
Material: The window security anti-theft lock is made of solid cast zinc structure, with a durable powder-coated surface, wear-resistant, smooth white surface, and can be used for a long time. You will get 4 window locks and matching screws.
Security: Installing a sash jammer locks on the window can protect your children and pets, and also prevent thieves from entering your home, making your stay safer and more comfortable.
Easy to Install and Use:The sash stopper can be easily installed using the included fixing screws, just follow the installation instructions provided. Just twist the interference arm to lock or release the window sash.
Application: These Window Latch are suitable for PVC-u and wood/composite doors and windows. It is also suitable for vertical sliding, single-hung and double-hung vinyl windows.
Multiple Functions: you can use vertical sliding sash lock on windows and sliding doors; The window sash lock set can also be given to your friends and family as an indispensable family gift to provide security for their lives, which can easily get their welcome and love
Customers say
Customers find the sash jammer blocker provides good security and is easy to install, with one mentioning it takes less than 20 minutes to set up. The product is solid, fits well, and offers good value for money. Customers appreciate its appearance, with one noting it doesn’t look out of place, and they value the extra peace of mind it provides.
13 reviews for 4 Pack Sash Jammer Blocker – Door & Window Lock Anti Theft – Additional Home Security for PVC/uPVC Windows and Doors – White
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Original price was: £8.99.£8.49Current price is: £8.49.
warren –
These are great!
These are very easy to fit and very easy to use. Just 2 screws per sash jammer. These add extra security to your home which also gives you extra peace of mind. The quality is really good. Very strong too. The performance of this product is great. I will be buying more of these for my mum who lives on her own. Great value for money and a great service from the seller. Thank you ð.
Ian –
Nice and secure
I liked these door stops. They are solid, well made and easy to fit and for the price a nice little security addition for peace of mind. Like anything you need to fit, measure twice and drill once or you may find you end up with unwanted holes. The product itself is spot on and two sets on each ofy doors helps me to sleep a little easier at night.
SLD –
Work
Iâm not a DIYâer so managed to mess up the installation! However, if you know what youâre doing – and after having watched a professional install these – they are easy!
TonyQ –
Great value, and peace of mind is priceless.
I was worried about how difficult these would be to install but it really only takes a couple of minutes. Doors and windows are so secure that I really did feel more comfortable and at ease.
robstark –
Spacers not great
The product feels pretty robust and does the job. My only criticism would be that the spacers that sit behind the fittings do not clip in and therefore pop out/shear up or down when you tighten up the fitting. The arm of the jammer is then at an angle. I did not use the spacers in the end but this meant not using the plastic clip in end to the armâ¦..so I have metal versus uPVC rather the UPVC on uPUVCwhen I deploy the arms. Not a problem for me as security trumps vanity on my old doors but would be a problem for many as I suspect it will scratch over time.
Amazon Customer –
Secure and easy to instal
Needed to urgently secure a upvc back door where the lock had broken. These were easy to fit with self tapping screws (no need to drill) and provided a great, secure solution. How task took less than 20 minutes. Would definitely recommend and would buy again if needed elsewhere. The only downside is, of course, you can now only unlock the door from the inside so will eventually have to get it replaced but at least itâs secure for now.
Adam. –
Easy to install
Took less than 10 minutes to install 4. All which was needed is a screwdriver. Nice added security
Amazon Customer –
Good product
Strong, sturdy and very easy to fit. I needed to buy some 5mm striker plates from Amazon to ensure a tight fit for the locking arm, but again they were cheap easy to fit and do the job perfectly.
calo –
Bon matériel solide
Guy Conil –
Correspond au descriptif. Parfait
Francesco –
Ho preso questa sorta di serratura per impedire ai bambini di aprire la porta finestra e le finestre nella zona mansardata. Si integrano molto bene negli infissi moderni non come altri chiavistelli ormai dall’aria antica . Nel complesso mi ritengo soddisfatto
Günny –
Als günstige Variante, der zu empfehlen, macht einen robusten Eindruck schnelle und einfache, Montage !
Eva Viatour –
Je suis satisfaite du produit