The 75.ND-M is a 75.ND with enhanced mechanical performance. Developed in 1988 by MECATISS Co, the 75.ND is a polymer from the elastomer group also called rubbers ELASTOMER SILICONE 75.ND bi-constituent Air & watertightness Hydrocarbon resistance. 25 m head pressure. Expansion joint 6 hours fire barrier Nuclear environment qualification ELASTOMER SILICONE 75.ND-M bi-constituent Fire barrier leaktightness to air, water, hydrocarbons, seawater. Expansion joint injectable in submarine environment. Nuclear environment qualification PMUC n° 24038 LOCA resistance after irradiation CEMETE EFT.CE 88.094A 6-hr fire barrier ( thickn. 150 mm ) Seals in hydrocarbon environment MECATISS / EDF-CIG 92 ED 0009 LOCA resistance before irradiation CEMETE EFT.CE 93.236A Nuclear environment qualification PMUC N° 24002 Leaktightness of seals in water 94 ED 0035 2-hr fire barrier full-mass electrical & mechanical penetrations. ( thickn. 200 mm ) CTICM 96 P 452 Irradiation