OmniFitâ Slab 35 is a Glass Mineral Wool slab, designed for use in multiple applications in both timber and steel frame construction, that offers excellent thermal and acoustic performance. It is non-combustible insulation with the best possible Euroclass A1 reaction to fire classification, and is manufactured using Knauf Insulation’s unique bio-based binder, ECOSEâ Technology. Easy to install Fast and close fit Easier to carry Soft to handle Offers a high level of thermal performance Suitable for use between timber or metal studs