REPERO 721E Self-Vulcanizing Tape 19 mm x 3 m Black EPR

Unlike standard adhesive tapes that rely on sticky backings, the REPERO 721E self-vulcanizing tape fuses into a single, homogeneous mass when stretched and wrapped. Made from ethylene propylene rubber (EPR), it creates a permanent, watertight seal without any glue—ideal for electrical insulation, cable splicing, and moisture protection in demanding environments.

Highlights

• Self-amalgamating: bonds to itself, no adhesive residue
• Excellent dielectric strength >20 kV/mm for safe insulation up to 69 kV
• Withstands extreme temperatures from -40°C to +90°C
• High elongation >700% allows tight, conforming wraps
• Resistant to UV, ozone, and moisture absorption

In daily use

Whether repairing a damaged cable jacket, sealing outdoor connections, or bundling wires in a junction box, this tape performs reliably. Stretch it to 100–200% of its original length while wrapping with 50% overlap; within minutes it fuses into a solid rubber layer. The black EPR material blends discreetly and offers excellent corrosion protection for metal components.

Full specifications

• Tape type: Self-vulcanizing / self-amalgamating
• Material: Ethylene propylene rubber (EPR)
• Width: 19 mm
• Length: 3 m
• Thickness: 0.76 mm (30 mil)
• Colour: Black
• Dielectric strength: >20 kV/mm
• Voltage rating: Up to 69 kV
• Operating temperature: -40°C to +90°C
• Application temperature: 0°C to +40°C
• Elongation at break: >700%
• Tensile strength: >1.0 MPa
• Water absorption: <0.1%
• UV resistance: Good
• Ozone resistance: Good
• Moisture seal: Excellent
• Corrosion protection: Yes
• Adhesion type: Self-fusing (no sticky adhesive)
• Standards compliance: RoHS

Final note

For electricians and maintenance professionals who need a dependable, long-lasting seal without the mess of traditional tapes, the REPERO 721E delivers performance that holds up under pressure.