Clean area around the nose, make it fat-free.
Put some SILICON on the INSIDE AREA. Best to mainly place the silicon in those areas (especially rails) where it has no contact to the non-slip of the boards, which makes it easier to clean the board when taking off the protector.
Slide the protector over the board nose.
Add silicon on the edge of the nose protector
Let the silicon dry for 1 or 2 days before sailing, other-wise the noseprotector might come off!
To remove the nose protector you simple cut the silicon on the edge and pull the nose protector off the board. Clean the board from silicon and the nose will look brand new.