Heavy Duty 6 mm Acoustic Rubber Underlay – Impact & Airborne Sound Insulation for Floors & Walls | Slip NotWhat is a 6 mm acoustic rubber underlay and why use it? This dense 6 mm acoustic rubber underlay absorbs impact noise and reduces airborne sound transmission between floors and walls. It cushions floors, protects subfloors and improves comfort underfoot. Use it under laminate, hardwood, tile or carpet to dampen footfall noise, prevent impact damage and enhance living and working spaces. What makes this underlay unique? Dual noise reduction: Cuts