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🚪 Seal the deal on comfort and style with STORMGUARD!
The STORMGUARD 21SR3970020B is a 20-meter black rubber seal designed to replace worn-out seals in UPVC doors and windows. Its universal fit and customizable length make it perfect for any standard frame, while the easy push-in installation ensures a quick upgrade that enhances insulation and renews your home’s appearance.

| ASIN | B005346O2Q |
| Best Sellers Rank | 130,879 in DIY & Tools ( See Top 100 in DIY & Tools ) 41,432 in Hardware |
| Brand | STORMGUARD |
| Colour | Black |
| Country of Origin | United Kingdom |
| Customer Reviews | 4.4 4.4 out of 5 stars (993) |
| Global Trade Identification Number | 00708747940206, 03619989872514, 05017259001578 |
| Included Components | 1 x Upvc Seal |
| Item Weight | 599 g |
| Manufacturer | STORMGUARD |
| Manufacturer Warranty Description | No guarantee. |
| Material | Rubber |
| Recommended Uses For Product | replacing damaged or worn out seals in uPVC door and window frames |
| UPC | 708747940206 |
| Unit Count | 1.0 count |
S**.
Wish I’d done this years ago - excellent product.
Our conservatory is over 20 years old and the original door gasket seals had perished. They were brittle and hard, so sitting near the door in the winter meant you could feel a definite draught. Over the years I had tried to fix the problem with those stick on strips you can buy from DIY stores but they looked messy and were never man enough for the job. I had a glazing firm in who said that the original ones were no longer made - usual story - so I thought I take a chance and order online. I did some research and because they were in a state, I measured a bit of the old gasket as accurately as I could. This universal seal is perfect! So easy to fit, I was getting suspicious! The arrow head part just popped into the groove with a little bit of pressure, I got away without needed washing up liquid, but a great tip. As others have mentioned, there does seem to be a little bit of lubricant on already which definitely helped. I found that it pays to be a bit careful to keep checking that when you are pushing the seal in, to go back and check that where you first started hasn’t slid along, especially before you cut of the excess at the end. If it has moved, it’s easy just to push it back into place with a bit of thumb pressure. The worst part of the whole job was pulling and digging out the original seal from the grooves, especially at the base. I’m so pleased with the final result. As well as being more efficient, the door looks clean and brand new - better than it has for years. I don’t know why I didn’t do this ages ago.
M**N
Works for me!!
Bought this after reading reviews. Fits my standard upvc door. Was a little concerned when parts kept popping out but that could've been me as after more pressure it's all in one place and appears to have stayed. Cant complain with the amount you get for the price. 20m! Have plenty to replace most of the windows if needed
J**S
Good quality
Good quality and easy to install. Use a little soapy water to aid with install. With this I was able to replace the seals on one side of my Upvc door frame and also do 2 seals on a 4 x 4 meter window frame (6meters) and one seal on another 4 x 4 meter window frame (12 meters in total). Just enough left over for our small bathroom window (2 meters). Will happily buy another one for the rest.
J**S
Easy to use and works well
Works very well , replaced an old brittle seal with this product,was easy to fit and cut to size
P**E
Easy to fit with no tools
Ordered yesterday, arrived today. Hardest bit was getting the old gasket out as it was so brittle. Used a very small flat head screwdriver in the groove to get all the old bits out then hoovered it, gave it a brush out with an old toothbrush and one more hoover to make sure there was no dust left. I didn't want to get it wet with any cleaning solutions to make it easier to fit the new gasket. The gasket comes neatly wound in a plastic tub with an airtight lid, pre-lubricated. I started at the top of the frame in the middle of the door and worked it all the way around back to the top without having to cut it once. It's flexible enough to go around the corners of the frame. I found that pushing the gasket into the groove and then wiggling my finger with pressure cross-ways against the direction of the gasket stopped me stretching it and ensured that the arrow-head shape on the gasket was tucked properly in on both sides. I turned the tub on the floor every so often to stop the gasket being twisted - this way I only needed to get out of the tub as much gasket as I needed to follow it around the frame. It was done in 10 minutes and looks like new now with a really good fit against the door. Very pleased with result.
J**2
not universal
Just a heads up to anyone considering buying this product : I do think it's good value and well packaged and well made BUT I tried to fit this to my upvc windows and it kept popping back out . when i contacted stormgaurd they said "The B338 Bubble Seal is only designed to fit the 96mm Steel Door Threshold or the 128mm Industrial Door Threshold, if either of these are the product you are using it should fit. If you are using it in another product it may not be the correct fit. " SO its designed to fit one of only TWO profiles .... not universal. amazon returned
M**A
Not bad and cheaper than a new door
Not bad, a little slack in the groove so feels like it will just fall out, however after a couple of weeks fitted in both a window and a French door it hasn't fallen out yet. Seals well enough but we did have a whistle through the door when it was very windy. A slight adjustment to the corner of the seal pretty much sorted that.
K**R
Easy enough for anyone to use.
Great product, easy to work with, couldn't be happier. Made my doors draft proof again. Highly recommend.
A**E
Nachdem mein Einkaufversuch im Baumarkt gescheitert ist, habe ich bestellt. Die Lieferung der Dichtung, offenbar eine britische, erfolgte schnell. Die Dichtung war im Eimer mit einer Flüssigkeit betreufelt, die das Produkt feucht und geschmeidig gehalten hat. Sie hat gut in die Nuten der PVC-Terrassentüren gepasst. Der Einbau war einfach und ging wesentlich schneller als die 19 Jahre alte "Dichtung" auszubauen. Ich werde mehr bestellen.
G**T
Je viens de terminer le remplacement des mes joints sur mes fenêtres. La pose est facile (et je ne suis pas grand bricoleur). Il s'insère parfaitement dans l'interstice prévu à cet effet. pour l'insérer facilement il suffit d'utiliser une petite spatule pour le positionner parfaitement. Le produit est donc conforme à la description et le produit semble de bonne qualité et très bien conditionné dans un seau. Je recommande le produit. Le temps confirmera la solidité et la longévité du produit...à suivre donc.
G**E
Con le misure giuste incastrano bene ed isolano dagli spifferi
C**N
PERFECTO PARA VENTANAS DE PVC, EN MI CASO. ENCAJAN PERFECTAMENTE, FACIL DE PONER, SE QUEDAN BIEN ANCLADAS Y MUY BUENE CALIDAD. LO ACONSEJO A TODOS LOS QUE TIENEN QUE CAMBIAR GOMAS EN VENTANAS.
A**O
l'articolo è all'altezza della descrizione e ha risolto il mio problema, l'applicazione è stata facile e rapida e solo il tempo ci dirà se la qualità è buona; grazie.
Trustpilot
3 days ago
2 weeks ago