Nick-I had a ZoneVI washer that started to separate on me. You realize how much outward pressue is on those outside walls? My solution was a permanent one. There is a product at marine stores called marine-tex. You carry this stuff onboard when your hull is leaking! Believe me it hardens like steel-it can be sanded and shaped. So what's not to like? Most expoxies fade in time-as I also applied some marine epoxy when I did this. The Marine-tex is stable-the expoxies are fading after 16 months.