Can it be applied as an interior or exterior coating? Yes. Exterior at 15 mils (.4mm) and interior 30 mils (.8mm) or thicker depending upon the situation. By Ashley Stevens|2021-05-07T12:08:32+00:00May 7th, 2021|0 Comments Share The Virtual Reality Post! FacebookTwitterLinkedInEmail Leave A Comment Cancel replyComment Save my name, email, and website in this browser for the next time I comment.