Trade Pack Pallet of 25 x Knauf Insulation DriTherm ¾ Cavity Slab 37 is a water repellent, Glass Mineral Wool slab designed for use in full-fill masonry cavity external walls, that offers excellent thermal performance.These BBA certified slabs eliminate the need for cavity barriers with non-combustible full fill insulation, minimising the risk of fire spreading through a cavity.Manufactured using Knauf Insulation's unique bio-based binder ECOSE ¾ Technology, they deliver superior environmental sustainability.