Measure your fabric shower curtain, then cut out a rectangle with the same measurements from a sheet of thin vinyl fabric.
Lay the fabric shower curtain right side down and flat onto a table top, and squeeze a line of fabric glue around the entire perimeter of the curtain.
Squeeze pea-sized dollops over the middle of the fabric shower curtain, spacing each dollop 12 inches apart.
Lay the vinyl fabric on top of the glue-covered fabric curtain, lining up the edges. Press the vinyl fabric firmly onto the fabric. Allow the glue to dry for 1 hour.
Punch out holes in the vinyl fabric through the established holes in the fabric shower curtain using a fabric single-hole punch.