Ametalin CeaseFire is an advanced vapour permeable wall and roof membrane designed specifically as a non-combustible pliable building membrane for use in Type A and B fire resisting constructions and in all construction types where superior passive fire performance and vapour permeability is a priority. Classified as Class 4 Vapour Permeable, the advanced hydrophobic infusion blocks liquid water and air movement while allowing water vapour diffusion through the wall structure. Ametalin CeaseFire also contributes to a well-sealed building for maximum energy efficiency. The E-Glass weave provides an Extra Heavy Duty and is not deemed combustible. Ametalin CeaseFire is a flexible single-layer membrane made with non-combustible E-glass fabric and treated with a hydrophobic flame and chemical resistant polymer infusion. The infused micro-structure enables CeaseFire to achieve Class 4 Vapour Permeable classification, while preventing the passage of liquid water, and air movement.