1. A PTC heating element comprising:at least one PTC element provided between strip conductors,
an insulating mass sealing at least one of the strip conductors and/or the PTC element over an entire circumference thereof, wherein the insulating mass is applied as a glue bead which seals the at least one of the strip conductors and/or the PTC element circumferentially,
an insulation layer which projects over an end side of one of the strip conductors, and which, with the strip conductor and/or the PTC element, defines a receiving portion receiving the insulating mass, and
a slide sheet lying against the insulation layer.