An elongated carrier for reinforcing a resilient wetherseal, said carrier comprising: a base portion extending along a longitudinal axis; a first side portion extending outward from said base portion to a distal first edge and defining a plurality of first slots extending transverse to said longitudinal axis with each adjacent pair of said plurality of first slots co-operating to define a first finger therebetween; a second side portion spaced from said first side portion and extending outward from said base portion to a distal second edge and defining a plurality of second slots extending transverse to said longitudinal axis with each adjacent pair of said plurality of second slots cooperating to define a second finger therebetween; said base portion, said first side portion and said second side portion cooperating to define a generally U shaped channel extending along said longitudinal axis; said base portion defines a plurality of base slots extending transverse to said longitudinal axis with each adjacent pair of base slots cooperating to define a web therebetween; each of said first fingers, each of said second fingers and each of said webs including a non-planar cross sectional shape along said longitudinal axis; each of said first fingers, each of said second fingers and each of said webs include a deformation extending transverse to said longitudinal axis extending away from a plane parallel said first side portion, said second side portion and said base portion respectively, to define said non-planar cross sectional shape of each of said first fingers, each of said second fingers and each of said webs; and said deformation of each of said webs is continuous with said deformation of at least one of said first fingers and at least one of said second fingers with said deformations extending from one of the first distal edge and the second distal edge to the other of the first distal edge or second distal edge; characterised in that said first slots and said second slots are staggered along said longitudinal axis relative to said base slots. a base portion extending along a longitudinal axis; a first side portion extending outward from said base portion to a distal first edge and defining a plurality of first slots extending transverse to said longitudinal axis with each adjacent pair of said plurality of first slots co-operating to define a first finger therebetween; a second side portion spaced from said first side portion and extending outward from said base portion to a distal second edge and defining a plurality of second slots extending transverse to said longitudinal axis with each adjacent pair of said plurality of second slots cooperating to define a second finger therebetween; said base portion, said first side portion and said second side portion cooperating to define a generally U shaped channel extending along said longitudinal axis; said base portion defines a plurality of base slots extending transverse to said longitudinal axis with each adjacent pair of base slots cooperating to define a web therebetween; each of said first fingers, each of said second fingers and each of said webs including a non-planar cross sectional shape along said longitudinal axis; each of said first fingers, each of said second fingers and each of said webs include a deformation extending transverse to said longitudinal axis extending away from a plane parallel said first side portion, said second side portion and said base portion respectively, to define said non-planar cross sectional shape of each of said first fingers, each of said second fingers and each of said webs; and said deformation of each of said webs is continuous with said deformation of at least one of said first fingers and at least one of said second fingers with said deformations extending from one of the first distal edge and the second distal edge to the other of the first distal edge or second distal edge; characterised in that said first slots and said second slots are staggered along said longitudinal axis relative to said base slots.