The Barrisol sheets are made with a polymer whose formula is property of Barrisol. Barrisol holds the patent of manufacture and composition of material. Barrisol holds more than 80 patents. Barrisol sheets are classified B S1-d0, B S2-d0 or B S3-d0 (depending on the finish) in Europe, CLASS 'O' under Building Regulation in UK and Class I in the USA. Barrisol sheets are not toxic and 100% recyclable.