Athens has sealers available for sale. Sealing refers to the act of minimizing the contact of the interior of a packet with the outside air. This retains the freshness of the item and also prevents contamination. Sealers are instruments or machines that can heat seal packaging. This can be used by food packaging industries, as well as your average supermarket for bagging fresh produce. Depending on the scale of the requirement, many different sealer models are available. Installation, training as well as servicing facilities may also be provided.