I have seen this referred to as "replacing the mastic", but the seal between my coping and the deck on my pool has developed a sizable crack. I assume this means replacement. The last time I had this done it cost me over $500. It looks like it could be a DIY job, though. Are there any instructions on troublefreepool showing how to do this? Some talk about a polyurethane seal that I assume goes at the bottom of the space? Is this a DIY or is it better left to the pros? And finally, if DIY, what kind of sealing materials should one use and where does one buy the polyurethane strip? See attached picture of closeup of current seal.
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