Answer:

Unactivated State (in storage):
Prerequisite: The desiccant remains in its original sealed packaging (unopened boxes or bags) and is stored on pallets in a dry and cool environment.
Shelf Life: Under these ideal storage conditions, the desiccant’s quality assurance period is generally 1 year. This means that if used within one year, its initial adsorption performance will meet standard requirements.

Activated State (in use within packaging):
Key Influencing Factors: Once the desiccant is placed inside the customer’s product packaging, its actual effective protection period (i.e., the time until it reaches saturation) is not fixed. Instead, it highly depends on the temperature and humidity of the usage environment, as well as the overall sealing performance of the packaging. The more humid the environment, the higher the temperature, and the poorer the sealing, the faster the desiccant will become saturated and lose effectiveness.

Model Selection Ensures Performance: Most importantly, during the selection of desiccant models for customers, our professional process takes into full account the target shelf life of the product, packaging size, product characteristics, and expected storage and transportation conditions. The adsorption capacity of the selected desiccant is designed to cover and exceed the amount of moisture that may infiltrate the packaging throughout the product’s entire shelf life. Therefore, as long as the correct model is selected, the desiccant will provide effective protection for the full duration of the product’s shelf life.

Summary:

• The shelf life is 1 year while in storage. To ensure reliable performance upon activation, please check whether this storage period has been exceeded.
• The actual service life after activation depends on environmental conditions; there is no universal “expiration time.”
• Professional model selection is key: The desiccant model is scientifically determined based on the required product shelf life to ensure continuous effectiveness throughout that period. Therefore, instead of overfocusing on the desiccant’s “theoretical expiration time” inside the packaging, it is more important to ensure correct model selection and trust in its protective capability over the product’s shelf life.