Durafit 500 Contract 15sqm Crumb Rubber Carpet Underlay: 6/6 Premium Durability, 3/6 General Comfort, 5.25mm Thick, 0.83 Low Tog, 1.37m x 11.00m Roll Suitable for stretch-fit, single-stick & double-stick installation of carpets. Single-stick & double-stick installation is recommended where there is a possibility of rucking, for instance if mobility scooters drive over the carpet. Especially recommended for hall, stairs, landing, lounge & dining rooms. Made from recycled car tyres, Duralay Durafit 500 is our second most durable underlay. Its 100% retention of work of compression ensures that in areas with heavy furniture, the carpet will remain protected. Durafit is a relatively thin underlay at 5.25mm which means it is suitable for large areas as well as small with no reduction in performance. An all-purpose contract underlay at a great price.