The mastic around my pool is in bad need of repair. I was going to to handle it myself, but the pool guy I just hired (after 9 years of being my own pool guy) told me that most DIY turns out looking badly. He referred me to a contractor who has yet to make an appearance at my house, but I was told it would be around $600. My research tells me that roughly 75% of that price is labor, and the material won't last more than a couple of years. I'm thinking just handle it myself (even though I just hired my first pool guy). I've read the thread here about Ultimate Pool Seal, which seemed to yield poor results. Then I came across Original Pool Seal, which is a new product (from a guy who happens to be in a legal dispute with the owner of Ultimate Pool Seal). This product looks interesting but has anyone tried it? Am I better off just going with Deck-o-Seal? Something else? Insights and experiences appreciated.