My understanding is the the single-season paints have to remain wet to maintain effectiveness. They are fine as long as they don't dry out - even for a couple years. The multi-season paints can dry and still be effective after re-launch.
I've been using CPA for the past couple of years, and have been very happy with it. Not much growth at all at haul-out.
"Figment" 1978 Pearson 30 #1083