How do you replace door seal on Hoover Nextra machine?

How do you take the outer seal off the Hoover Nextra Washing machine? It is a white plastic thing that sits into the face of the door panel located behind the door of the machine? Do i have to scrap out what looks like sealant to release it?? and what sealant should I use to replace it??

Also any tips on refitting the inner seal which is held inplace by a sping loaded wire clamp as its quiet tight on space....cheers...I am having to do this as the bearings went and before i had chance to replace them the wobberly drum ate the edge of the seal...