This 3mm foam underlay has a laminated clear vapour barrier on both sides. Providing superior protection against moisture migration from the subfloor. It also has a double overlap for enhanced joint seal protection. It is water repellent , resistance to fungi mould and bacteria. Thermal insulation, impact and airborne sound insulation. Dust free and lightweight to use. It is eco-friendly and quick and easy to use. This is one of our top sellers. Suitable for laminate, engineered and solid wood domestic installations.