Large-format desiccant bags
Silica Gel Bags
Heavy bags from 200 g to 5 kg for corrugated cases, engineering crates and shipping containers.
Absorbs 35–40% of its own weight, with an optional hanging hook
MOQ 25 kg
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Metal & Engineering Product Protection
Keeping bare machined surfaces above the corrosion threshold in crates and long-term store.
The problem
What actually goes wrong
Steel corrodes when the relative humidity at its surface passes roughly 60%. Below that, corrosion effectively stops. The entire objective of packing a metal component is to hold the air around it below that threshold for as long as the part is in the box.
The answer
Seal the enclosure, then put in enough desiccant to hold the enclosed air below 50% RH for the intended storage period — with margin for the moisture that will permeate in.
The method
How to get this right
A repeatable sequence, in the order that matters. Skipping the first step is the usual reason the rest disappoints.
Our recommendation: Silica gel bags of 500 g to 5 kg sized to crate volume, hung from the crate frame, with a blue indicating fill so the condition is readable.
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Seal first
Desiccant in an unsealed crate is wasted. A barrier liner is what makes the dose meaningful.
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Measure the enclosed volume
Net air volume after the part is in place, not the external crate dimensions.
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Calculate the charge
About 170 g per cubic metre as a baseline, increased for long storage or a permeable enclosure.
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Hang, do not bury
Suspended bags sit in the air space and see the moisture; bags under the load do not.
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Add a visual check
Indicating fill or an indicator card lets stores staff assess condition without unpacking.
What you will need
Products for this solution
Irregular crystal form
Silica Gel Crystals
Angular, glassy crystals in white non-indicating and blue indicating, graded across six mesh ranges from 9–12 mm down to under 1 mm.
Cobalt-free and DMF-free in both white and blue
MOQ 25 kg
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Self-indicating desiccant
Blue Silica Gel
Cobalt-chloride indicating gel that shifts from deep blue to light pink as crystals, or blue to white as beads, telling you at a glance when it needs changing.
Changes colour when spent — no guesswork on replacement
MOQ 25 kg
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Packed sachets
Silica Gel Pouches
The core packed range: silica gel sealed into breathable pouches from 0.5 g to 5 kg, in Tyvek, non-woven, paper or cloth.
Fourteen standard sizes, four pouch materials, custom sizes to order
MOQ 25 kg
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Montmorillonite clay desiccant
Clay Desiccant Pouches
Natural clay desiccant in thirteen sizes from 1 g to 1 kg, in composite paper, filter paper, non-woven or Tyvek.
Absorbs up to 50% of its own weight at 25 °C and 100% RH
MOQ 25 pieces
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White adsorbent, no indicator
Non-Indicating Silica Gel
Plain white silica gel with the broadest mesh range in the catalogue and the highest published loading at high humidity.
Highest published adsorption — ≥70% at 90% RH
MOQ 25 kg
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Who this applies to
Industries using this solution
Talk to our experts
Tell us what you are protecting — we will specify the rest.
Send us the product, the enclosure, the route and the storage period. You will get a desiccant type, a dose and a format back — not just a price list.