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You are purchasing 10 m² - Please enter your desired quantity 401 kPa compressive strength - The perfect underlay for 3-6 mm thick LVT click vinyl/design flooring without a backing board - Slightly adhesive on one side Impact sound improvement approx. 17 dB(A) - Reduction of sound transmission to rooms below or adjacent. However, the exact reduction depends on the material base (PE, PUR, cork, etc.) and the material thickness measured in accordance with DIN EN ISO 140-8. Walking sound improvement 20% - Improved room acoustics by minimizing the so-called “clack-clack effect” when walking on the floor. The extent of the walking sound improvement depends on a variety of factors (material base, density, etc.). Thermal resistance 0.01 m²K/W - The thermal resistance of the entire floor structure should not exceed 0.15 m² K/W for water-heated floors. The lower this value, the more suitable the underlay is for use on heated floor surfaces.