Soundfoam ML HYHydrophobic Melamine Foam.Permanently repels water per ASTM D2842.Also repels oil per AATC118.Passes FAR 25.856 (a) for Aircraft, Aerospace applications.Tested to BSS 7239 for Toxicity.Meets BMS8-385C, Grade 2.Facings of PEKK, PEEK, Kapton, Tedlar, Nomex availableAll of the features and benefits of Soundfoam ML.Kapton, Tedlar, Nomex are registered trademarks of the E.I. duPont de Nemours & Company