Well,...if theres a cap ( moulding )that goes on top of the seam which I ASSUME. Theres a product called RESCUE 911. Its a clear spray on formula for roofing etc. Spray on,..no more leaks,....works great. $20a can. It comes in a clear can,...thats the fast fix. If shes a beauty runway queen. I,d start all over, and have them do it again.