Assuming it’s a post 52 Big Boot (mine is)
Has the seal been fitted around the correct way?
Counter intuitively the curve of the rubber’weather seal’ should point the outer edge toward the frame so that it is clamped hard to the frame. The joint is best at the bottom to avoid any leeks at the top
It makes the screen harder to fit and needs 2 people to fit, I to push at the top and one in the car to put the bolts in.
The other seals are just cover strips for the metal edge and don’t really do anything.
BTW even with a bit of rubber grease smeared on the inside in driving rain it can still leak a bit…
