Just found your post. Maybe not so great. I too, a fellow Long Islander, went down to Sea Doo to get the lube after reading your post. Shop keepers said that that lube, or any kind of the same family of lubes, will undoubtedly EXPAND any rubber it touches. It's soul purpose is to work on metal. With the rubber expanding and contracting it could shorten the life of the boot??? It looks good, but maybe not the best for the boot.