O-rings must be stored in the proper manner to ensure that they will seal properly when fitted. Storage, cleaning and maintenance should therefore by carried out in accordance with the DIN 7716 guidelines.

O-rings should always be stored where they are protected from external damage such as surface damage due to staples or distortion from heavy weights laid on top of them. O-rings must also be stored in a dry place and if possible at room temperature.

O-rings should be stored in sealed polythene bags where possible, should not be exposed to daylight for long periods and should be kept away from sources of ozone.

These precautions will considerably reduce any change in the properties of the O-ring due to premature ageing, hardening or weathering and will increase their service life without significantly restricting their use.