A description is given of a sealing system (1) which is to be provided under the floor of an animal accommodation. Said sealing system comprises floor segments (2) which are separated from one another by at least one slot (5)which is present between side walls (6) of said floor segments and via which manure drops into a cellar (K). The upper side of a sealing (7) which is obliquely suspended in the slot and which is made of an elastic material is secured in an opening (9) of one of the two sidewalls and the bottom side (10) thereof rests on a projecting edge (11) of the opposite side wall. The sealing is provided with a thickening (12) formed in situ on the upper side thereof, which thickening is made of the same material and is a manually detachable tight fit in the opening (9) constructed as a longitudinal opening.
