I only use EpoxyUSA epoxy for waterproofing. He swears that it will be 100% waterproof, and I have not seen that claim elsewhere. It is also really easy to apply. I have done blister jobs on a few older boats and it seems to be a superior product to me. My current
boat had been previously repaired with Interlux
epoxy barrier coat, the gray stuff, and had about 3000 dime sized blisters
about 5 or 6 years later. Maybe my current
repair will only last that long, I will see. But if it does not you will be able to read my attacks forever after.