This is the final step!
My C30 is one year older than yours - I've had 2 starboard port lights that leak when it rains - have had three pails in place when it rains since I bought the boat.I've used every gooey squirt stuff to seal from the outside - there have been no apparent gaps.I knew about this product but had not seen it in stores; found it at a West Marine store last weekend. http://www.captaintolley.com/I do not work for them, I own none of their stock, and never used the stuff before. This is a virgin, serious review. Caulk/seal with what you prefer, let it setup, then, run a small bead of this stuff where you see no gaps or cracks. I did this three times, the fluid disappears - it get's into places you cannot see.We've had 6" of rain in Norf**k over the past 3 days and NOT A DROP has entered the boat. The product is so thin it "wicks" into very tiny places, seals, and stays flexible.This is the best invention since White Castle hamburgers and blow up sheep.