Sealed-enclosure desiccant
Desiccant Bags
Bagged desiccant for sealed enclosures where the target is a dew point, not just a humidity percentage.
Drives sealed enclosures toward a −100 °F dew point
MOQ 25 pieces
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Aerospace Applications
Dew-point-specified protection for avionics, optics, composites and long-held spares.
The problem
What actually goes wrong
Aerospace requirements are usually written as a dew point, not a humidity percentage, and the storage periods run to years. Silica gel loses most of its useful capacity below about 30% RH, which is precisely the region these specifications work in.
The answer
Where the target is a percentage, silica gel is correct. Where it is a low dew point, molecular sieve is the right medium — and the enclosure has to be genuinely sealed for either to mean anything.
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: Molecular sieve or dew-point-rated desiccant bags in a sealed barrier, with a low-range indicator card for verification.
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Read the specification carefully
A dew point requirement and an RH requirement call for different media.
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Confirm the enclosure seals
Dew-point-level control is impossible in an enclosure that breathes.
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Choose the medium
Molecular sieve below roughly 20% RH; silica gel above it.
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Size for the full interval
Charge for the whole preservation period plus permeation allowance.
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Verify inside the barrier
A low-range indicator card inside the same barrier confirms the condition achieved.
What you will need
Products for this solution
Synthetic zeolite adsorbent
Molecular Sieve
3A, 4A, 5A and 13X zeolites for applications where silica gel cannot drive the humidity low enough.
Dries far below the level silica gel can reach
MOQ On enquiry
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Type A zeolite, 4 Å pore
Molecular Sieve 4A
Approximately 4 Å pore size — the standard choice for static deep drying.
The general-purpose deep-drying sieve
MOQ On enquiry
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Reversible humidity indicator
Humidity Indicator Cards
Blue-to-pink indicator cards in single, three, four and six spot versions covering RH ranges from 5% to 60%.
Reads the actual humidity inside the pack, at a glance
MOQ 200 pieces
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Tyvek-sealed desiccant packs
Silica Gel Desiccant Packs
Type A silica gel beads sealed one-side into DuPont Tyvek, supplied with the documentation regulated customers ask for.
DMF-free and cobalt-free with MSDS, SGS and RoHS documentation
MOQ 25 kg
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Foil sealing & shielding tape
Aluminium Foil Tape
Aluminium foil tape for thermal duty and EMI/RFI shielding.
Seals barrier packaging and shields against EMI/RFI
MOQ On enquiry
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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.