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Some were fiberglass and some were EPDM rubber. In either case, you can reseal as needed using Dicor 501 lap sealant. Clean the existing loose seal off and wash throughly with a mixture or TSP and dishsoap. Then let it dry well and apply. Uses a caulking gun and comes out like thin toothpaste. Self-leveling and it won't crack or harden. Hope that helps here. Please get back to me if you need more as all follow ups are included in our fee. No time limit
Just following up here on your question. I am wondering if you perhaps missed my earlier response or did you get this resolved? Easy to do with the large amount of e-mail most of us get these days! If you need me to resend it, please let me know. Thanks