JCP uPVC Window & Door Replacement Bubble Gasket Seal 8 x 9mm 6m Tub

JCP uPVC Window and Door Seal Push-in Bubble Gasket Strip, 8mm x 9mm, Black, 6m Pack

Stop draughts and cut heat loss with this 6m pack of black push-in bubble gasket seal – the easy, no-adhesive fix for worn uPVC window and door seals.

JCP uPVC Window and Door Seal Push-in Bubble Gasket Strip provides an effective, economical solution for replacing worn, hardened, or cracked window and door seals. This handy 6-metre pack is ideal for resealing a single window or door – or topping up an existing repair – eliminating uncomfortable draughts, reducing noise intrusion, and helping lower your heating bills by preventing heat loss around frames. Perfect for winter proofing your doors and windows against cold weather, this draught excluder strip creates an effective thermal barrier that keeps warm air in and cold draughts out.

Manufactured from durable TPE (thermoplastic elastomer), this black bubble gasket strip features a simple push-in design that slots directly into existing grooves without messy adhesives or specialist tools. The flexible bubble profile compresses to create an effective weatherstrip seal between frame and sash, restoring the weathertight performance your uPVC windows and doors had when new. Ideal for casement window seals, door frame seals, and any uPVC window parts replacement project. Supplied as a neatly coiled 6m pack that is easy to store and quick to work from.

Key Benefits for uPVC Window and Door Owners:

• Eliminate Draughts and Reduce Energy Costs – Effectively seals gaps of 3–4.5mm between window or door frames and sashes, preventing cold air infiltration and reducing heating bills by maintaining internal temperatures more efficiently throughout winter months. This draught excluder solution can significantly improve your home's thermal efficiency.
• Quick Push-In Installation – No adhesive, no specialist tools required. Simply press the gasket stem into your existing groove (3.2–4.0mm width) for a secure, professional fit that anyone can achieve in minutes. Perfect DIY window seal replacement for homeowners looking to save on professional installation costs.
• Practical 6m Pack Size – Enough continuous length to reseal a typical casement window or uPVC door in one go, without paying for a bulk roll you don't need. Ideal for a single repair or a small draught-proofing job, so you only buy what the project actually requires.
• Restores Original Performance – Specifically designed to replace deteriorated push-in seals that have shrunk, hardened, or cracked over time, returning your uPVC windows and doors to their original draught-free, weathertight condition. Fixes common problems like windows won't close properly or doors not sealing effectively.
• Reduces Noise and Rattles – The compressible bubble profile not only blocks air gaps but also cushions the closure, reducing annoying rattles from loose-fitting windows and dampening external noise for a quieter, more peaceful home environment. Provides effective sound insulation alongside thermal protection.
• Durable TPE Construction – High-quality thermoplastic elastomer material maintains flexibility across temperature extremes, resisting the hardening and cracking that causes premature failure in inferior seals, ensuring long-lasting draught protection and weather resistance.
• Easy to Store Between Jobs – The compact 6m pack coils neatly into a toolbox or drawer, keeping the seal clean and tangle-free so any leftover length stays in good condition for future maintenance or additional window seal repairs.
• Professional Black Finish – Discreet black colour blends seamlessly with standard uPVC frames and gasket channels, maintaining a neat, professional appearance that won't detract from your window and door aesthetics. Suitable for both white and coloured uPVC installations.
• Precise Fitment Sizing – Clearly defined 8mm x 9mm bubble profile (excluding stem) allows accurate matching to your existing seal dimensions, ensuring proper compression and effective sealing when correctly measured and fitted. Prevents common fitment issues associated with incorrect gasket sizing.
• Year-Round Comfort Improvement – Not just a winter solution – improved sealing also helps keep cool air inside during summer, reduces pollen and dust infiltration, and protects against rain penetration during storms. Complete weatherproofing protection for all seasons.

Product Specifications:

• Brand: JCP
• Product Type: Push-in Bubble Gasket Seal Strip / Window and Door Draught Excluder
• Bubble Profile Size: 8mm (Width) x 6mm (Height) – bubble only, excludes stem
• Designed Gap Seal Range: Approximately 3–4.5mm (between frame and sash when closed)
• Groove Width Compatibility: Approximately 3.2–4.0mm
• Material: TPE (Thermoplastic Elastomer)
• Colour: Black
• Length: 6 metres continuous strip
• Packaging: Supplied as a 6m pack
• Installation Method: Push-in fit (no adhesive required)
• Application: uPVC window frames, uPVC door frames, composite doors, casement windows, tilt and turn windows
• Temperature Range: Suitable for all UK weather conditions

Important: Always compare your existing seal profile and measurements to the size diagram provided in the product images before ordering to ensure correct fitment. Measure the bubble dimensions (excluding the stem) and check your groove width for compatibility. This replacement gasket is for push-in type seals only – not suitable for adhesive-backed or co-extruded seals moulded into the frame. If you are unsure which size you need, please contact us and we'll be happy to help.

Pro Tips:

Pro Tip: Before removing your old gasket completely, pull out a small test section and compare it against the product diagram to confirm sizing. Measure the full perimeter of your window or door first – a standard casement sash typically needs 4–5 metres, so one 6m pack covers a single opener with a little spare. Start at a corner or joint, press the stem firmly into the groove, and work methodically around the frame. Cut the gasket slightly longer than needed, then trim precisely at joints for neat, professional-looking corners. Clean the groove thoroughly with a dry cloth before fitting to ensure secure seating.

Package Contents:

• 1 × 6m continuous strip of black push-in bubble gasket seal

Frequently Asked Questions:

How do I know if this window seal gasket will fit my windows or doors?
Pull a small section of your existing gasket away from the frame and compare the bubble profile dimensions to the size diagram in our product images. The bubble should measure approximately 8mm wide x 9mm high (including the stem), and your groove should be approximately 3.2–4.0mm wide. This seal is designed for push-in type gaskets only – it cannot replace adhesive-backed or co-extruded seals that are moulded into the frame. If your current seal has a similar bubble profile and pushes into a groove, this replacement gasket should be compatible.

How much seal do I need – is 6 metres enough for my window or door?
Measure the full perimeter of the opening sash or door leaf where the seal sits, then add a little extra for trimming at corners. As a guide, a typical uPVC casement window needs around 4–5 metres and a standard uPVC door around 5–6 metres, so one 6m pack usually covers a single opener. For multiple windows and doors, simply order the number of packs your measurements call for.

Will this draught excluder work on both windows and doors?
Yes, absolutely. This push-in bubble gasket is suitable for both uPVC windows and uPVC doors, as well as composite doors with compatible groove profiles. It's commonly used on casement windows, tilt-and-turn windows, and uPVC entrance doors where the seal sits between the frame and opening sash or door panel. It effectively prevents draughts, reduces heat loss, and improves overall thermal efficiency on all these applications.

Can I use this seal between the glass and the frame?
No, this gasket is not suitable for sealing between glass and frame (glazing seals). It's specifically designed to seal the gap between the window/door frame and the opening sash or panel when closed – this is the primary area where draughts occur. Glazing seals typically require different profiles and are often bonded or wedged in place using different methods. This seal targets the frame-to-sash gap where most air leakage and heat loss happens.

How long will this replacement gasket last?
The TPE (thermoplastic elastomer) construction is designed to stay flexible through UK temperature extremes, resisting the hardening, shrinking and cracking that causes cheaper PVC seals to fail within a few seasons. Fitted correctly into a clean groove, it will continue compressing and sealing reliably for years, maintaining your draught-proofing and weather resistance long term.

Why Choose the JCP Push-in Bubble Gasket Seal Strip?

Restoring the weathertight performance of your windows and doors shouldn't require expensive professional intervention or complicated installation. JCP bubble gasket strip puts effective draught-proofing back in your hands with a simple push-in solution that delivers immediate, noticeable improvements in home comfort and energy efficiency. The 6-metre pack is sized for real jobs – enough to reseal a window or door properly, without paying for bulk length you'll never use – at a fraction of the cost of replacement windows or professional resealing services. With durable TPE construction that resists the premature deterioration plaguing cheaper alternatives, you're investing in a long-term solution that continues protecting your home and reducing energy waste year after year.

With over 30 years in the uPVC window and door hardware trade, JCP Hardware supplies parts we'd fit ourselves. Measure your existing seal against the size diagram, order with confidence, and if you're unsure which profile you need, get in touch – we're happy to help you get it right first time.