As with most things EC-12 I do it differently. I stick down strips of Monokote Trim Sheet a little more than one inch wide on the 3 sides of the hatch cover plastic strips, same color as the deck. So the leaky side of the hatch strips is positively sealed.
One benefit to this method is that I feel safe in laying down all strips of plastic rather than the need for cutting the top of the hold down U-shaped piece out of one large piece of plastic. The trim sheet should run past the aft end, but only near the outside half of the U. That way (hopefully) the aft end of the U gets held down, but you are able to slide the hatch cover into place.
This method might leave some lumps and wrinkles where the trim sheet does not want to flatten out well, so perhaps not a good idea for anyone but myself.
Tom's Mama would never approve. The trim sheet is not happy that it is being asked to follow the curve of the deck along the front of the U at deck level and then at U level.
This is not a cure-all for bad behaving double sided tape, but maybe worth a try. This trim sheet can be difficult to peel back up if left in place for any length of time.