How long can silica gel be stored ?
Almost indefinitely. The key to retaining a sachets usefulness is to keep it under air tight conditions until it needs to be used. Silica gel will adsorb moisture from any environment, so a sachet left out in the open will immediately start taking up water vapour. Although the moisture uptake rate is not fast, small sachets can be vulnerable to such exposure, as they do not have a large moisture holding capacity. It is recommended that they are not left open to the atmosphere for longer than 15 minutes. Larger sachets should not be removed from their packaging more than 1 hour before they are required for use. The shelf life of silica gel in a sealed environment can safely be said to be between 4 and 12 months. Practical experience has shown that it can often far exceed this.
Almost indefinitely. The key to retaining sachets usefulness is to keep it under air tight conditions until it needs to be used. Silica gel will adsorb moisture from any environment, so a sachet left out in the open will immediately start taking up water vapor. Although the moisture uptake rate is not fast, small sachets can be vulnerable to such exposure, as they do not have large moisture holding capacity. It is recommended that they are not left open to the atmosphere for longer than 15 minutes. Larger sachets should not be removed from there packaging more than 1 hour before they are required for use. The shelf life of silica gel in a sealed environment can safely be said to be between 12 and 18 months. Practical experience has shown that it can often far exceed this.
