Improve comfort, reduce condensation and stop draughts with our quality range of uPVC window seals and uPVC window gaskets. Designed specifically for uPVC frames, these weather-proof strips help seal the gap between the window sash and frame — keeping warm air in and cold air, water and dust out.
Whether you’re replacing worn-out seals or upgrading to a high-performance gasket, our products are precision-cut for a perfect fit, long-term durability and fast DIY installation.
Why choose a uPVC window gasket or seal?
Stops external weather and draughts entering your home
Helps reduce condensation and damp build-up
Enhances insulation and can reduce heating costs
Fits easily into existing uPVC frames with minimal tools
How to install your uPVC window seal
Measure the length of the sash that contacts the frame.
Choose the appropriate profile and size from our collection.
Clean the mounting surface, then peel and stick (or screw-fix) the gasket or seal.
Test the window operation to ensure a smooth fit and airtight closure.
Browse the full range below to find the right uPVC window gasket or seal for your home — from economy strips to premium weather-proof profiles.
Explore the detailed product pages, compare finishes and sizes, and enjoy fast UK dispatch and great value from Home Secure™.
Choosing the right profile for your window can be tricky — so we’ve made it simple with our uPVC Window Seal & Gasket Sample Pack. Each pack includes a selection of our most popular gasket and bubble seal profiles, allowing you to:
Test fit different profiles in your own windows before ordering full lengths.
Compare material flexibility and size for the best fit and compression.
Save time and money by ensuring you buy the correct seal the first time.
👉 Explore the Rubber Seal Sample Pack— the easiest way to find your perfect uPVC window gasket replacement.
Pull a short sample from a corner and match its cross-section — common profiles include bubble gaskets, E-gaskets and flipper gaskets in varying sizes. Ordering by profile shape and dimensions beats guessing by brand; a cut sample against our profile guide identifies it fast.
Draughts you can feel, whistling in wind, condensation and water tracking in at the frame edges, and rubber that's shrunk back from the corners, hardened or cracked. Gaskets typically age out years before the window itself does.
Yes — pull the old gasket from its channel, clean the groove and press the new one in, starting mid-rail and easing it into corners without stretching. No adhesive needed. It's among the most satisfying cheap fixes on ageing uPVC.
Yes — order the length you need with a little spare for corners. Measure the full perimeter of every sash and frame channel you're renewing and round up; joins are best avoided anywhere visible.
No — misting between the panes means the sealed glass unit itself has failed and needs replacing. New gaskets fix draughts and water ingress around the frame, and they'll smarten perished rubber, but internal condensation is a glass unit issue.
