40-series fusible tapes have a minimum elongation before fracture of 15%. These self-fusing silicone rubber tapes incorporate a sinusoidal fiberglass fabric that gives a controlled elongation and increased tear resistance. This reinforcement provides excellent mechanical characteristics while allowing the tape to conform to irregular shapes. Arlon STD silicone tapes provide superior electrical insulation with a dielectric strength of 300 VPM minimum at 356 °F. - Arlon reinforced MOX-Tape 40-series (formerly SB) fusible tapes incorporate a sinusoidal fiberglass fabric that gives a controlled elongation and increased tear resistance and tensile strength of the tape. MOX-Tapes provide a uniform thickness even around sharp edges. These controlled stretch tapes provide a uniform insulation barrier. Fiberglass fabric, encapsulated inside the silicone rubber, prevents wicking and maintains high insulation resistance under high humidity conditions.