B004 Bubble Gasket

The B004 is a bubble-style glazing gasket with a distinctive domed or curved "bubble" top section. This shape allows compression to form a reliable seal between the opening sash/leaf and the outer frame in compatible aluminium or uPVC window and door systems, reducing draughts, water penetration, and noise transmission. It functions as a push-fit seal that inserts into the specific groove of matching profiles. It serves as an effective replacement for original seals that have worn, hardened, or lost elasticity over time. Key specifications to evaluate suitability: Gasket style: Bubble type with rounded/domed top (distinct from B003 or other bubble variants in exact dimensions; differs from flipper gaskets with fins, wedge types, or E-gaskets). Material: Extruded from durable TPE or PVC compound in black. Supplied lengths: Coiled rolls of 10 meters (suited to minor jobs), 25 meters, or 50 meters. Profile matching: Groove sizes and shape are unique to specific window/door systems. The B004 fits only profiles engineered for this precise bubble configuration. It is not universal and is not officially endorsed or tested by system manufacturers. Verification process: Exact measurements are system-dependent. Compare directly with your existing gasket or use a sample matching service by supplying a section of the current seal for identification. Not suitable for: Profiles requiring different gasket shapes or sizes (e.g., finned flippers, wedges, or alternative compression styles). This is the correct gasket if your existing worn seal precisely matches the B004 bubble profile. Direct visual or sample comparison is critical to ensure proper fit.