The invention relates to a tip seal (10) for an adapter (1) and such an adapter (1) for a pressurized dispensing container comprising a viscous foamable solution, said adapter (1) comprising a tube (11) in connection with said container and conveying the into foam converted viscous foamable solution towards said tip seal (10), said tip seal (10) comprising a core part (101) with an at least partially open proximal end (101a) and at least partially open distal end (101b), said core part (101) at least partially being inserted into said tube (11) at said proximal end (101a); and a cap part (102) which is movably connected with said core part (101) at said distal end (102b) of said core part (101) between an open position and a closed position of said tip seal (10), wherein said cap part (102) comprises a closure element (1021) which is adapted for closing off said at least partially open distal end (101b) of said core part (101) in said closed position of said tip seal (10).