S/I Tape is a self-fusing silicone tape made of specially formulated silicone rubber. The tape has no adhesive, but chemically bonds to itself upon contact. Once wrapped, it forms a permanent seal within 24 hours that is airtight and waterproof, can insulate up to 8kV, withstands temperatures between -54°C and 260°C, and can even stop a pressurized leak.