right o ,ill have a go
i got the latex 3d socks from guilford marine
all you do really is cut back the latex ankle seal to about 5 cm left
put something inside the remaining seal to hold the shape (i used an off cut of waste pipe,the stuff your tolet is plumbed up with),then lightly sand both surfaces(i didnt bother sanding and it seems ok )
put the sock on to the opersite end of the pipe and line up (for lenght and make sure the foot is pointed the correct way)
roll the sock back and appily glue to the sock and the remaining latex seal leve to dry then put the glued surfaces together
at this point i left it for about half hour then removed the former tube(waste pipe)as the glue is designed for rubber/plastic it would of stuck to the tube if left much longer
then leve for 24 hours then test
this gives you the basc idea
the glue and sandpaper came with the socks in a kit ,with better intructions than ive just written
hope this helps