For specifiers
You design sealed enclosures, sensors, cameras or outdoor equipment for your clients. AirSponge is a passive desiccant that regenerates on its own, to be specified at the design stage: one sticker on an internal wall, no electronics, no maintenance.
Join our first specifiers: Axandus, Blender…
Why
A design firm meets condensation project by project, often during qualification, when the enclosure is already frozen. AirSponge is decided earlier and does not change the design.
Self-adhesive sticker about 1 mm thick bonded to an internal wall. No drilling, no wiring, no power. Works alongside an existing pressure equalization vent, or replaces it.
Fogging on optics or lenses, PCB corrosion under thermal cycling: the most frequent cases reported by our customers. The activation threshold at about 60% RH keeps the internal air below the risk zone.
The material regenerates spontaneously at ambient temperature. No sachet to replace, no heater, 0 W. Service life aligned with the equipment, from -20 °C to +70 °C.
Sizing, hygrothermal modeling and climate chamber testing (-10 °C to 70 °C, 5 to 95% RH) to validate the solution under project conditions before the design review.
Process
1
Enclosure or envelope type, internal volume, IP rating, presence of optics, site climate. Three lines in the form below are enough.
2
Reply within 24 business hours with a proposed format and surface area. The sample kit ships for your tests or your client's.
3
The part number goes into the BOM. Your client orders directly, online or on quote. You stay independent: no commission, no exclusivity.
Evaluation kit
Free for design consultancies, engineering firms and EMS providers with an identified project.
Integration
| Volume | Format | Surface |
|---|---|---|
| < 0.5 L | AS-B XS | 5 cm² |
| ≤ 1 L | AS-B S | 10 cm² |
| ≤ 10 L | AS-B M | 20 cm² |
| ≤ 100 L | AS-B L | 40 cm² |
| > 1 m³ | AS-C tape | 200 × 8 cm strips |
Order of magnitude. The sizing tool refines it from climate, IP rating and thermal cycling. Custom die-cuts available down to a few cm².
Requirements
Two paragraphs ready to paste into a requirements document or a BOM note. Replace [V] with the project's internal volume.
Passive humidity control: the enclosure integrates a self-regenerating desiccant based on mesoporous alumina (AirSponge AS-B type, So Sponge), bonded to an internal wall, with an active surface area sized for an internal volume of [V] L (XS/S/M/L format per supplier sizing). The desiccant provides a useful adsorption capacity at least 8 times that of silica gel at equivalent mass in the 60-90% RH range, an activation threshold of approximately 60% RH, spontaneous regeneration at ambient temperature without energy input, an operating range of -20 °C to +70 °C and a thickness of approximately 1 mm. It requires no replacement and no maintenance over the service life of the equipment. Non-toxic mineral material, REACH compliant, made in France.
Passive humidity control: the envelope (cabinet, box, shelter, container) integrates pre-adhesive strips of self-regenerating desiccant based on mesoporous alumina (AirSponge AS-C type, So Sponge, 200 × 8 cm), bonded to the internal walls, in a quantity defined by supplier sizing according to the internal volume of [V] m³ and the site climate. The desiccant provides a useful adsorption capacity at least 8 times that of silica gel in the 60-90% RH range, spontaneous regeneration at ambient temperature, an operating range of -20 °C to +70 °C, 0 W, with no consumables and no maintenance over the service life of the installation. Non-toxic mineral material, REACH compliant.
Documentation
Sticker AS-B product page
Characteristics, formats, climate chamber tests.
Ribbon AS-C product page
Large volumes: cabinets, EV chargers, containers. 85-day field results.
Condensation sizing tool
Annual condensation risk and recommended surface area by climate and IP rating.
Solution comparison
Silica gel, breather vent, hygrostat and heater, SRD: criteria and 10-year cost.
Gore vent vs AS-B test
Protocol and climate chamber results on an IP66 enclosure.
The SRD material
Mesoporous alumina, capillary condensation and spontaneous regeneration.
Evaluation kit
Reply within 24 business hours with a sizing proposal.
We will get back to you within 24 business hours at with a sizing proposal and the kit shipment.
Yes. The kit is free for design consultancies, engineering firms and EMS providers with an identified project involving a sealed enclosure or an enclosed space exposed to condensation. No commission, no exclusivity, no minimum volume.
No. The AS-B is a self-adhesive sticker about 1 mm thick that sticks onto an internal wall of the enclosure. No drilling, no wiring, no power supply. It is applied on the assembly line, bare-handed, with no specific PPE.
The two are complementary. A vent (Gore type) balances pressure but does not control internal humidity. AirSponge adsorbs the water vapor present inside the enclosure. A climate chamber test showed that the AS-B eliminates condensation in an IP66 enclosure where the vent alone fails. Depending on the specification, the AS-B complements the vent or replaces it.
The internal volume gives a first order of magnitude: XS below 0.5 L, S up to 1 L, M up to 10 L, L up to 100 L, AS-C tape above 1 m³. The online sizing tool refines this from the site climate, IP rating and thermal cycling. For critical cases, So Sponge performs the sizing and climate chamber tests.
Yes. Custom die-cut formats are available down to a few cm² for miniature enclosures. Describe the available geometry in your kit request.
AirSponge is not yet UL Recognized. We provide material data sheets and test results, and can consider a UL submission if volume justifies it. The active material is a mesoporous aluminum oxide, mineral and non-toxic, REACH compliant.