JCP uPVC Window & Door Replacement Bubble Gasket Seal 8 x 9mm 100m Roll

JCP uPVC Window & Door Bubble Gasket Seal 8 x 9mm 100m Black Push-In Strip

Replace worn uPVC window and door seals with this 8 x 9mm push-in bubble gasket. 100m black draught excluder strip that slots straight into existing grooves — no adhesive needed.

JCP uPVC Window and Door Bubble Gasket Seal is the straightforward fix for draughty, rattling, or poorly sealing uPVC windows and doors. Over time the original push-in seals shrink, harden, and crack, letting cold air, noise, and rain past the frame. This 8 x 9mm replacement gasket — an 8mm x 6mm bubble with a 3mm stem that pushes into the groove — restores the weathertight seal your frames had when new. The generous 100-metre roll lets you re-seal multiple windows and doors throughout the home from a single purchase.

Manufactured from durable TPE (thermoplastic elastomer), this black bubble gasket stays flexible across temperature extremes, resisting the hardening and cracking that causes cheaper seals to fail. The simple push-in design slots directly into existing gasket channels with no messy adhesives or specialist tools, and the discreet black finish blends neatly with both white and coloured uPVC frames.

Key Benefits for uPVC Window & Door Owners:

• Cut Heating Bills and Banish Draughts – Seals the gap between frame and sash to stop cold air infiltration, helping your home hold its heat and keeping winter heating costs down. A low-cost way to make a noticeable difference to comfort and energy use.
• Quick Push-In Fitting — No Tools or Glue – Simply press the stem into your existing groove for a secure fit anyone can achieve in minutes. A genuine DIY job that saves the cost of calling out a fitter for simple seal replacement.
• One 100m Roll Does the Whole House – The generous continuous length re-seals multiple windows and doors from a single roll, working out far cheaper than pre-cut lengths or professional resealing for a whole-home draught-proofing project.
• Restores That Original Weathertight Fit – Designed to replace push-in seals that have shrunk, hardened, or cracked, returning ageing uPVC windows and doors to their original draught-free condition and curing windows or doors that no longer close snugly.
• Quieter, Rattle-Free Windows – The compressible bubble profile cushions the closure, silencing rattles from loose-fitting windows and dampening outside noise for a more peaceful home.
• Built to Last in All Weathers – High-quality TPE stays supple in summer heat and winter cold, resisting the premature hardening that plagues inferior seals, so your draught protection keeps working year after year.
• Tidy Black Finish – The discreet black colour blends seamlessly into standard uPVC gasket channels, keeping a neat appearance on both white and coloured frames.
• All-Year Protection – Beyond winter draught-proofing, a good seal helps keep interiors cooler in summer, blocks pollen and dust, and guards against rain penetration during storms.

Product Specifications:

• Brand: JCP
• Product Type: Push-in bubble gasket seal strip / window and door draught excluder
• Overall Profile Size: 8 x 9mm (8mm wide x 9mm deep, including push-in stem)
• Bubble Size: 8mm wide x 6mm high (bubble only, excluding 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: 100 metres, continuous roll
• Installation Method: Push-in fit (no adhesive required)
• Application: uPVC window frames, uPVC door frames, composite doors, casement windows, tilt and turn windows

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

Pro Tips:

Pro Tip: Before stripping out the old seal completely, pull out a short test section and hold it against the size diagram to confirm the bubble and stem match. When fitting the new gasket, start at a corner, press the stem firmly into the groove, and work methodically around the frame — cut each length slightly long and trim precisely at the joints for neat corners. Wipe the groove clean and dry first so the new seal seats securely.

Package Contents:

• 1 × 100m continuous roll of black push-in bubble gasket seal strip

Frequently Asked Questions:

How do I know if this seal will fit my uPVC windows or doors?
Pull a small section of your existing gasket away from the frame and compare it to the size diagram in our product images. The bubble should measure roughly 8mm wide x 6mm high (excluding the stem), with an overall depth of around 9mm including the push-in stem, and your groove should be approximately 3.2–4.0mm wide. If your current seal pushes into a groove and matches this profile, this replacement should be compatible. All measurements need to match — if you are unsure, contact us before ordering.

Do I need any tools or adhesive to fit it?
No. This is a push-in seal that simply presses into your existing gasket channel by hand — no glue, no specialist tools. Most people fit it in a few minutes per window, making it an easy DIY job.

Can I use this between the glass and the frame?
No — this gasket seals the gap between the frame and the opening sash or door panel, which is where most draughts occur. Glazing seals (between glass and frame) use a different profile and fitting method, so this strip isn't suitable for that.

How many windows will a 100m roll cover?
That depends on your frame sizes, but 100 metres is enough to re-seal multiple windows and doors throughout a typical home, with plenty spare for future maintenance. Measure the perimeter of each opening sash to estimate how much you'll use.

Why Choose the JCP Bubble Gasket Seal?

Restoring the weathertight performance of your windows and doors shouldn't mean expensive call-outs or complicated work. This JCP push-in bubble gasket puts effective draught-proofing back in your own hands with a simple solution that delivers an immediate, noticeable improvement in comfort and energy efficiency. The 100-metre roll offers exceptional value for whole-home weatherproofing, and the durable TPE construction resists the premature deterioration that plagues cheaper seals — so it keeps protecting your home and cutting energy waste year after year.

Backed by JCP Hardware's 30+ years in the uPVC window and door trade, you can order with confidence knowing you're getting a genuine replacement part suited to the job. If you're unsure which size you need, just measure your existing seal and get in touch — we're always happy to help you get the right fit first time.