Visico™ ME4425/LE4438 is a silane crosslinkable natural compound system designed for insulation of low voltage energy cables. Visico ME4425 is a medium density polyethylene, copolymerized with vinyl silane. Visico LE4438 is a crosslinking catalyst masterbatch specially designed to be used with Visico base resins. The system crosslinks quickly in sauna or in hot water. Cable insulation with a proper mixture of Visico ME4425 (95 parts) and Visico LE4438 (5 parts) exhibits excellent thermo-oxidative stability. The combination is suitable for both copper and aluminium conductors.