A slide of a closing device, this slide: - including: - a profile having a U-shaped cross-section and including a bottom as well as two parallel walls (41; 41') extending from this bottom, and at least one of which includes a recess (42; 42') having a first groove as well as a second groove; - at least one gasket (6; 6'), such a gasket (6; 6') consisting of an elongate element including, on the one hand, a base (60; 60') positioned inside the recess (42; 42') of one of the walls (41; 41') of the profile, including a first free end as well as a second end opposite the first free end, and on the other hand, a lip (61; 61') extending, on the one hand, from this base (60; 60'), longitudinally and laterally, and on the other hand, at least partly outside the recess (42; 42') of the wall (41; 41') of the profile as well as inside the slide; - holding means for holding the gasket or gaskets (6; 6') inside the recess or recesses (42; 42'), these holding means consisting, on the one hand, of the first groove, which this or these recesses (42; 42') include and which receives the first free end of the base (60; 60') of this or these gaskets (6; 6'), and on the other hand, of the second groove, which this or these recesses (42; 42') include and which receives the opposite second end of the base (60; 60') of this or these gaskets (6; 6'); - wherein: - the elongate element has a V-shaped cross-section; - the base (60; 60') of this elongate element consists of one of the legs of the V; - the lip (61; 61') of this elongate element consists of the other leg of the V, is located in the extension of said base (60; 60') and extends from the second end of this base (60; 60'), longitudinally and laterally with respect to this second end as well as while forming an acute angle with this base (60; 60'). - including: - a profile having a U-shaped cross-section and including a bottom as well as two parallel walls (41; 41') extending from this bottom, and at least one of which includes a recess (42; 42') having a first groove as well as a second groove; - at least one gasket (6; 6'), such a gasket (6; 6') consisting of an elongate element including, on the one hand, a base (60; 60') positioned inside the recess (42; 42') of one of the walls (41; 41') of the profile, including a first free end as well as a second end opposite the first free end, and on the other hand, a lip (61; 61') extending, on the one hand, from this base (60; 60'), longitudinally and laterally, and on the other hand, at least partly outside the recess (42; 42') of the wall (41; 41') of the profile as well as inside the slide; - holding means for holding the gasket or gaskets (6; 6') inside the recess or recesses (42; 42'), these holding means consisting, on the one hand, of the first groove, which this or these recesses (42; 42') include and which receives the first free end of the base (60; 60') of this or these gaskets (6; 6'), and on the other hand, of the second groove, which this or these recesses (42; 42') include and which receives the opposite second end of the base (60; 60') of this or these gaskets (6; 6'); - a profile having a U-shaped cross-section and including a bottom as well as two parallel walls (41; 41') extending from this bottom, and at least one of which includes a recess (42; 42') having a first groove as well as a second groove; - at least one gasket (6; 6'), such a gasket (6; 6') consisting of an elongate element including, on the one hand, a base (60; 60') positioned inside the recess (42; 42') of one of the walls (41; 41') of the profile, including a first free end as well as a second end opposite the first free end, and on the other hand, a lip (61; 61') extending, on the one hand, from this base (60; 60'), longitudinally and laterally, and on the other hand, at least partly outside the recess (42; 42') of the wall (41; 41') of the profile as well as inside the slide; - holding means for holding the gasket or gaskets (6; 6') inside the recess or recesses (42; 42'), these holding means consisting, on the one hand, of the first groove, which this or these recesses (42; 42') include and which receives the first free end of the base (60; 60') of this or these gaskets (6; 6'), and on the other hand, of the second groove, which this or these recesses (42; 42') include and which receives the opposite second end of the base (60; 60') of this or these gaskets (6; 6'); - wherein: - the elongate element has a V-shaped cross-section; - the base (60; 60') of this elongate element consists of one of the legs of the V; - the lip (61; 61') of this elongate element consists of the other leg of the V, is located in the extension of said base (60; 60') and extends from the second end of this base (60; 60'), longitudinally and laterally with respect to this second end as well as while forming an acute angle with this base (60; 60'). - the elongate element has a V-shaped cross-section; - the base (60; 60') of this elongate element consists of one of the legs of the V; - the lip (61; 61') of this elongate element consists of the other leg of the V, is located in the extension of said base (60; 60') and extends from the second end of this base (60; 60'), longitudinally and laterally with respect to this second end as well as while forming an acute angle with this base (60; 60').