Place the first sheet against the back wall of the shower and set a level on top.
Glueing plastic sheet to wall.
Hold it firmly against the concrete until the epoxy sets up.
Firmly press the plastic and the other surface together.
Step 5 fix the plastic piece in place in the epoxy.
Contact adhesive is the industry stander for gluing formica to drywall.
Start along the top edge with a thick bead of adhesive and work downwards.
Secure your plastic to the other surface with clamps.
Hold plastic sheeting up to the wall and press into place when properly positioned.
Apply the adhesive in short zigzags or waves.
Leave the clamps in place until the glue is completely dry.
The glue should be applied with a sprayer paint roller or brush.
Start at the top of the wall and work over then down both pressing pulling and smoothing as you go.
Work quickly so that you can attach the pieces before the epoxy sets up.
Using your brush completely coat the plastic sheeting and the other surface with contact cement.
Adjust the sheet until it is level and draw a plumb line across the top either on the drywall or right on the.
Apply construction adhesive to the wall.
Here is more detail about what kind of glue to use on formica.