The main component of Onduline System roofs is the Onduline HR roofing sheet. “High Resistance” type Onduline boards consist of a combination of bitumen impregnated organic fiber and a special resin. The paint, which is impregnated with the resin in the body of the board with a special method, ensures that the colors of Onduline HR remain stable even under the most difficult conditions. It is a maintenance-free and environmentally friendly product. As of January 2011, Onduline HR plates to be produced in Onduline Avrasya Sapanca factory will be produced with "Onduline" written on them by cold printing. This printing will be one of the distinguishing features of the plates, so that the plates can be distinguished from imitation or similar products at a glance. On the back of the plates, there will be the expression EN 534, Onduline HR logo, and the production date (in months) indicating that the product is produced according to European standards. The size, color and other technical features of the boards will remain the same.