Acrylic Bond Failure
After these windows were incorrectly installed we were called in to rectify the job. It would appear that the wrong primer was used on the Acrylic Windows which resulted in complete bond / urethane failure.
Acrylic Windows must have the correct primer and it is vital to prepare the surface correctly.
Here are a few pictures of the urethane failures, the urethane adhered to the primer fine! But the primer just let go of the Acrylic!
The completed project after removing and refitting new Acrylic Windows to Sika procedures: