A seal structure (10) has a flange (12) which locates against the flange of another member (22) and is held there by a "U" shaped clip (32). Member (22) has one or more cut outs (30) in its flange, and clip (32) has a corresponding number of tags (34) form...

The sealing strip (3'), for introduction into a channel (2') with a U-shaped cross section with inward protrusions (6') at its top, is provided above its elastic hooking lips (5') with additional lips (7') exerting a counter-force on the groove top.