Hi Ed. We're sorry to hear that you had difficulty using this adhesive. Please ensure that the patch is cut with rounded edges, that the surface is cleaned with alcohol (never soap), and that the patch and adhesive were applied evenly. This adhesive works by melding your liner with a vinyl patch, creating a permanent bond. Please note that old vinyl liners (5-10+ years) may become naturally brittle, and will not meld properly. You can see our full instructions here (http://www.poolmaster.com/wp-content/uploads/2019/01/30279-80-81_RepairKitInstruct_Web2018OLPR.pdf) or feel free to contact us at (800) 854-1492 for assitance.