All kinds of weather will happen. Your sealed carton can sometimes go through a long journey on the way to your customer's location. High temperatures, low temperatures, humidity and dust create challenges for transportation. Will the tape you use remain sealed and keep the product safe when exposed to various weather conditions? If you seal the carton with plastic tape, your carton is at risk. The plastic tape sits on top of the corrugated cardboard box, so it won't create a strong seal and won't be tamper-proof. Even under ideal environmental conditions, the plastic tape can lead to theft.