Step 5 fix the plastic piece in place in the epoxy.
Glueing plastic sheet to wall.
Apply construction adhesive to the wall.
Here is more detail about what kind of glue to use on formica.
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.
Leave the clamps in place until the glue is completely dry.
Contact adhesive is the industry stander for gluing formica to drywall.
The glue should be applied with a sprayer paint roller or brush.
Firmly press the plastic and the other surface together.
Usually there should be two coats applied before sticking the mica because drywall is somewhat porous.
Start along the top edge with a thick bead of adhesive and work downwards.
Hold plastic sheeting up to the wall and press into place when properly positioned.
Hold it firmly against the concrete until the epoxy sets up.
Hold the plastic up over the wall you want to cover and use a utility knife to cut around extrusion such as windows and pipes.
Secure your plastic to the other surface with clamps.
Place the first sheet against the back wall of the shower and set a level on top.
Start at the top of the wall and work over then down both pressing pulling and smoothing as you go.