[abl1111]

3M makes a mildew resist, silicone ( it comes in a green and white cartridge ) costs about $14.

I just did the same thing this past weekend. Works great !

Clean the seams w/ a good fiberglass cleaner, I like Interlux 202, to get any crap off. Use 3M's blue tape and tape it all off - all around and both sides of the "seam". It seems like a waste of tape but it is the right way to do it.

Then, run a decent bead of silicone around the whole seam. Lastly, and this is the trick - get a few paper towels handy: lick your pointer finger and use it as a squeegee over the seam. Go 12" or so and wipe off the excess in a towel. Lick your finger again and continue doing that until you've gone all the way around.

It will skin in 2-3 hours and be cured in 24 hours. It will look like it did when it came out of the factory !

alan