Tyre comprising a crown, two sidewalls, two beads, each sidewall connecting each bead to the crown, the tyre comprising a carcass reinforcement anchored in each bead and extending in each sidewall and radially inwardly at the crown, the crown comprising: - a tread intended to come into contact with the ground when the tyre is rolling, - a crown reinforcement arranged radially between the tread and the carcass reinforcement, the carcass reinforcement comprising at least one carcass layer, the crown reinforcement comprising a working reinforcement comprising at least one working layer, the tyre comprising a sealing layer for sealing against an inflation gas, the sealing layer being intended to delimit an internal cavity closed with a mounting support for the tyre once the tyre has been mounted on the mounting support, the sealing layer comprising a junction between two circumferential end edges (23A, 23B) of the sealing layer, the junction forming a radial overlap between one of the circumferential end edges (23A, 23B) of the sealing layer and the other of the circumferential end edges (23A, 23B) of the sealing layer, characterized in that the junction extending in a main direction forms, with the circumferential direction of the tyre: - in a portion of the sealing layer extending axially in radial line with the working layer or the radially innermost working layer and having an axial width equal to at least 40% of the axial width of the working layer or of the radially innermost working layer, an angle ranging, in absolute value, from 20° to 60°, - in a portion of the sealing layer extending radially in each sidewall and having a radial height equal to at least 5% of the radial height of the tyre, an angle, in absolute value, strictly greater than the angle of the main direction of the junction in the portion of the sealing layer extending axially in radial line with the working layer or the radially innermost working layer. - a tread intended to come into contact with the ground when the tyre is rolling, - a crown reinforcement arranged radially between the tread and the carcass reinforcement, the carcass reinforcement comprising at least one carcass layer, the crown reinforcement comprising a working reinforcement comprising at least one working layer, the tyre comprising a sealing layer for sealing against an inflation gas, the sealing layer being intended to delimit an internal cavity closed with a mounting support for the tyre once the tyre has been mounted on the mounting support, the sealing layer comprising a junction between two circumferential end edges (23A, 23B) of the sealing layer, the junction forming a radial overlap between one of the circumferential end edges (23A, 23B) of the sealing layer and the other of the circumferential end edges (23A, 23B) of the sealing layer, characterized in that the junction extending in a main direction forms, with the circumferential direction of the tyre: - in a portion of the sealing layer extending axially in radial line with the working layer or the radially innermost working layer and having an axial width equal to at least 40% of the axial width of the working layer or of the radially innermost working layer, an angle ranging, in absolute value, from 20° to 60°, - in a portion of the sealing layer extending radially in each sidewall and having a radial height equal to at least 5% of the radial height of the tyre, an angle, in absolute value, strictly greater than the angle of the main direction of the junction in the portion of the sealing layer extending axially in radial line with the working layer or the radially innermost working layer. - in a portion of the sealing layer extending axially in radial line with the working layer or the radially innermost working layer and having an axial width equal to at least 40% of the axial width of the working layer or of the radially innermost working layer, an angle ranging, in absolute value, from 20° to 60°, - in a portion of the sealing layer extending radially in each sidewall and having a radial height equal to at least 5% of the radial height of the tyre, an angle, in absolute value, strictly greater than the angle of the main direction of the junction in the portion of the sealing layer extending axially in radial line with the working layer or the radially innermost working layer.