Sealing tape is specifically designed to seal caps to bottles or to seal the lids of Petri dishes, an alternative to shrink-wrapping. The unique elastomeric characteristics allow the tape to stretch and conform around the irregular perimeters of these vessels to form a tight seal. The seal will block water vapor loss, reduce the rate of gas exchange, and prevent the entry of contaminants. Waterproof and chemically resistant to most organic solvents and caustic agents. The seal remains flexible down to –30° C and withstand continuous exposure from –40°C to +77°C (with intermittent exposure up to 100°C). Heavy 5mil (0.005in.) thick tape is durable and resists abrasion and puncture.