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Bostik Breathe Humidity Absorber: neat, clean and effective

Effective, silent and with a neutral colour palette, I put the Bostik Breathe Humidity Absorber to the test in my family home. Here's my honest review.

By Poppy O'Neill | Last updated Nov 7, 2025

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Mumsnet Badge Bostik Breathe Humidity Absorber

Price on writing: £12 | Buy now from Amazon

Our rating:
Pros

What we like

  • Compact

  • Effective

  • Subtle colour

  • Clear liquid

  • Easy to empty and refill

Cons

What we don't like

  • Expensive refills

Key specs

Tank capacity: 1.2l | Dimensions: 22 x 22 x 10cm | Weight: 990g | Max room size: 25m²

How I tested

I tested the Bostik Breathe Humidity Absorber in a cold corner of my home over the course of 10 weeks in late summer and autumn. Taking detailed notes on quality, effectiveness and user-friendliness, I measured how long it took for the moisture absorber to fill with liquid, comparing it with similar products like the Unibond Aero 360.

Related: Best moisture absorbers

Bostik Breathe Humidity Absorber: my verdict

Performance: 15/15

Quality and durability: 13/15

Ease of use: 15/15

Value for money: 10/15

Refill value for money: 5/10

Plastic waste: 10/10

Style: 7/10

Scent: 10/10 (unscented)

Total: 85/100

It's a rare UK home that doesn't have the odd damp or mould-prone corner, and mine is no different. Although I use my Meaco Arete One dehumidifier when drying washing indoors, there are certain parts of the house that need the more constant, low-level maintenance of a moisture absorber.

The Bostik Breathe is a slim, effective moisture trap in a subtle colour that'll blend in with pretty much any room. I placed it on a bookcase at the chilly end of a bedroom, and was surprised at how much moisture it collected.

As with any moisture absorber, the Bostik Breathe is silent and doesn't use any power whatsoever. Once placed inside the unit, the white tablets attract moisture in the air, converting it into a clear liquid that's collected in the lower chamber of the moisture absorber.

It's quick and clean to empty and refill with tablets - it takes two small tablets at a time for rooms up to 25m², or one for small spaces. I like that, unlike the Unibond Aero 360, the liquid collected is clear, so I didn't end up with blue on my fingers or splashed on my sink - and I wasn't worried about spilling on the carpet, although the design makes mishaps like this unlikely.

The unit is reusable and made partly from recycled plastic, so it's much kinder to the environment than disposable moisture traps. While the tablets do leave some residue inside the top of the moisture absorber, I found it quick and easy to wipe away.

The one drawback? The price of refills. The Bostik Breathe is designed to take two tablets at a time if you're using it in a room up to 25m², and they're priced at roughly twice Unibond Aero 360 refills. For smaller spaces, one tablet at a time is recommended for the Bostik Breathe.

The Bostik Breathe took 25 days to fill up with moisture (this will vary depending on room size, temperature and humidity), which is about the same as the Unibond Aero 360's 29 days. While they're both £12 at the time of writing for a starter unit, the upkeep of the Bostik is that much more expensive, with a pack of 4 costing £10. While a 4-pack of Unibond Aero 360 refills also costs £10, these are used one at a time, with each refill lasting roughly one month.

Read next: Best dehumidifiers

How does the Bostik Breathe Humidity Absorber work?

The refill tablets in the Bostik Breathe Humidity Absorber are made from calcium chloride, which naturally draws excess mositure out of the air. The crystals absorb vapour from the air in your home, then slowly dissolve, forming the liquid that drains into the bottom of the moisture trap unit.

Once the tablets have fully dissolved and the tank is full of liquid, simply pour the liquid away and refill with fresh tablets.

Read next: Best quiet dehumidifiers

How effective is the Bostik Breathe Humidity Absorber?

I found this moisture absorber really effective. What I like about this style of moisture absorber is that you can see exactly how much it's working, from the water level in the chamber.

Taking under a month to fill up, the Bostik Breathe is a hard-worker, providing consistent, low-level dehumidification without the need for electricity.

Read next: Best window vac

Does the Bostik Breathe Humidity Absorber offer good value for money?

At £12 for a starter set with two tablets, it's a great price for a high-quality product, and about the same as the Unibond Aero 360. As both moisture absorbers are reusable, they're a good investment, costing less in the long run than cheaper, disposable moisture traps.

However, the refill tablets for the Bostik Breathe are about twice the price of the Unibond Aero 360. If you're using the Breathe in a room up to 25m², two tablets are recommended, and one for small spaces.

The Bostik Breathe has the edge over the Unibond Aero 360 in the looks department, as it's a much more subtle colour with clear liquid, compared to the Aero's bright blue features and liquid.

In short, I think it's worth paying that bit more for the more subtle design if you're looking for a moisture trap that'll blend into the background in a prominent area.

About the author

Poppy O'Neill is a Content Editor at Mumsnet and a mother of two. She researches and reviews the products Mumsnetters swear by, with a particular focus on home essentials, laundry and fans. From a highly-recommended retractable washing line to the best quiet fans money can buy, and Mumsnet's favourite dehumidifier to the steam generator iron that'll cut your ironing time in half, she loves to deep-dive into research and find the very best products on the market.