Moisture control inside the primary pack — boxes, cartons, jars and barrier bags — where the container desiccant cannot reach. Each sachet is dosed by the volume of the pack and the time it will spend in transit and storage.
They solve different problems. Silica gel protects a small, closed volume — the inside of a box. A container desiccant has to handle the litres of water moving through some 67 cubic metres of air for weeks. Many shipments need both: see container desiccants.
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Box size, product and transit time are enough for a recommendation and a quotation.