Adjust the sheet until it is level and draw a plumb line across the top either on the drywall or right on the.
Gluing plastic sheet to wall.
Wait 3 to 5 minutes for the polishing compound to set.
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.
Contact adhesive is the industry stander for gluing formica to drywall.
Apply the adhesive in short zigzags or waves.
Clean the surface of the plastic to remove any grime and dirt using dish detergent and warm water.
Before working with any kind of plastic be sure to put safety first.
Place the first sheet against the back wall of the shower and set a level on top.
Apply a small amount of polishing compound to the plastic according to the label directions.
Hold plastic sheeting up to the wall and press into place when properly positioned.
Usually there should be two coats applied before sticking the mica because drywall is somewhat porous.
When gluing plastics together always work in a well ventilated area.
Plastic adhesives release strong fumes while a small gluing job is low risk breathing these fumes for a long time can cause lightheadedness headaches and other complications.
Here is more detail about what kind of glue to use on formica.
Apply construction adhesive to the wall.