Cut your patch to size then use pen to make size of patch on boat then sand around area where patch is going and underside of patch. Clean well with acetone then put aleast 3 coats of pvc rib glue on patch and boat leaving touch dry each coat, then apply patch using small metal roller or handel of large srewdriver rub/roll over to make sure you have a good bond. Once dry clean around patch with acetone
Make sure ther is no moisture in air or not in direct sunlight As pvc glue dosent like ither
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