B003 Bubble Gasket

The B003 is a bubble-style glazing gasket featuring a distinctive domed or curved "bubble" top section. This design provides compression to create an effective seal between the opening sash/leaf and the outer frame in aluminium or uPVC window and door systems, helping to block draughts, water ingress, and external noise. It is a push-fit gasket that inserts directly into the designated groove of compatible profiles. This makes it suitable as a direct replacement when the original seal has degraded, flattened, or no longer rebounds properly after compression. Key specifications to assess compatibility: Gasket style: Bubble type with rounded/domed top (distinct from flipper gaskets with fins, wedge gaskets, or E-style gaskets). Material: Extruded from durable TPE or PVC compound in black. Supplied lengths: Coiled rolls of 10 meters (ideal for smaller repairs), 25 meters, or 50 meters. Profile matching: Exact groove dimensions vary by window/door system. The B003 is compatible only with profiles designed for this specific bubble shape and size. It is not a universal fit and is not officially endorsed or tested by window system manufacturers. Verification process: Dimensions are profile-specific. To ensure this is the correct gasket, compare against your existing seal or use a sample matching service—provide a small section of the current gasket for accurate identification. Not suitable for: Systems requiring alternative gasket profiles (e.g., those with fins, wedges, or different compression methods). This gasket is the right choice if your worn seal matches the B003 bubble profile exactly. Visual or sample comparison is essential to confirm fit before use.