Suntuf Roof Panels Leaking

The flashing is manufactured with the same 3 in.
Suntuf roof panels leaking. Will this be waterproof enough. About 5 years ago i built a covered porch with half polycarbonate roof panels and half metal panels. My clear sunturf polycarbonate roof panels over my deck have leaks. Rain water does not shed onto the roof panels but instead goes under.
The manufacturers of polycarbonate recommend silicone for sealing the overlap of the corrugation and for also putting a dollop over the heads of the screws although the special screws do have a built in washer. Last year it started to leak at one screw so i tightened it and the leak stopped this year there are 6 locations where it is leaking at the screws. The suntuf ridge cap is a corrugated flashing the suntuf ridge cap is a corrugated flashing intended specifically to provide a solution for eliminating leaks where two suntuf corrugated roofing panels meet to form a peak or ridge in a traditional a shaped roofline. Suntuf is lightweight durable and easy to cut and drill using basic woodworking tools plus features 99 9 uv protection keeping the panel and everything underneath of it protected.
Everything is installed per manufacturer s recommendation. I love the clear roof panels over my deck that replaced the fiberglass ones that were there but now there are muliple leaks where the panels overlap and also all along where the deck roof meets the house.