Kontrol Refill Moisture Krystals (1KG Scent Free) image 1 Kontrol Refill Moisture Krystals (1KG Scent Free) image 2 Kontrol Refill Moisture Krystals (1KG Scent Free) image 3 Kontrol Refill Moisture Krystals (1KG Scent Free) image 4

Kontrol Refill Moisture Krystals (1KG Scent Free)

£2.83(inc VAT) £3.99
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  Product Description
Kontrol Refill Moisture Krystals are calcium chloride crystals designed to absorb excess moisture in caravans, motorhomes, campervans and storage spaces. Each 500g bag absorbs up to one litre of water from the air over a six to eight week period, depending on humidity levels. The scent-free formula works silently without needing electricity or batteries, making it ideal for vehicles in storage or off-grid camping situations where power isn't available.

These refill crystals fit Kontrol's Streamline and Mega Moisture trap systems, which collect the absorbed moisture as liquid in a separate container. The hygroscopic properties of calcium chloride mean the crystals actively pull moisture from the surrounding air, helping prevent condensation on windows, damp patches on soft furnishings, and the musty smells that develop in closed-up vehicles. Caravanners and motorhomers typically use them during winter storage, though they're equally effective during humid summer months when condensation builds up overnight.

The resealable bag design lets you top up your moisture trap as needed rather than using the full 500g at once. While the crystals work well in most conditions, they'll saturate faster in very damp environments like coastal areas or if there's an existing moisture problem from leaks. The system requires you to empty the collected liquid regularly and dispose of it safely, as the calcium chloride solution shouldn't be poured onto plants or metal surfaces.

Kontrol Refill Moisture Krystals (1KG Scent Free) Features


  • 1Kg resealable bag
  • Attracts and removes moisture from the air
  • Helps prevent damp, mould and mildew
  • Absorbs up to one litre of moisture
  • Effective for six to eight weeks
  • For use with Streamline and Mega Moisture traps
  • Scent free

Frequently Asked Questions

How long do 500g Kontrol Moisture Krystals last in a caravan?
The 500g bag typically lasts six to eight weeks before the crystals fully saturate and need replacing. Duration depends on ambient humidity levels, with higher moisture environments causing faster saturation. In very damp coastal locations or during wet winter storage, you might need to replace them more frequently, while drier conditions extend their working life.
Which Kontrol moisture traps do these refill crystals fit?
These refill crystals are compatible with Kontrol Streamline and Mega Moisture trap systems. The crystals sit in the upper compartment of these traps while the absorbed moisture collects as liquid in the lower container. They won't work properly in other brands' moisture traps as the collection system differs, and the crystals need a specific chamber design to function correctly.
How much moisture can 500g of Kontrol Krystals absorb?
Each 500g bag absorbs approximately one litre of moisture from the air before reaching saturation point. The calcium chloride crystals gradually turn into liquid as they pull moisture from the surrounding environment. You'll need to empty the collection container regularly as it fills, particularly in damp conditions where moisture absorption happens faster.
Why choose scent-free Kontrol Krystals over fragranced versions?
Scent-free Kontrol Krystals prevent moisture problems without adding artificial fragrances to your caravan or motorhome's interior. This matters for people with scent sensitivities, those who prefer natural air quality, or when storing vehicles where trapped fragrances can become overpowering. The moisture absorption performance remains identical to fragranced versions, with only the scent component removed from the formula.
Do Kontrol Moisture Krystals need electricity to work?
Kontrol Krystals work through passive absorption without requiring electricity, batteries or any power source. The calcium chloride crystals naturally attract moisture through hygroscopic properties, making them ideal for caravans and motorhomes in storage where power isn't available. This silent operation also means no running costs beyond replacing the crystals when saturated.
Can you reuse Kontrol Moisture Krystals once they've absorbed moisture?
Kontrol Krystals cannot be reused once saturated because the calcium chloride chemically bonds with absorbed moisture and turns into liquid solution. When the crystals have fully dissolved and the collection container fills with liquid, you need to dispose of the solution safely and add fresh crystals from a refill bag. The resealable bag packaging lets you use partial amounts if needed.
Where should you place Kontrol Moisture Krystals in a caravan?
Position the moisture trap on a stable, level surface away from soft furnishings, ideally in the main living area where air circulates. Avoid placing traps directly on carpets or upholstery as spilled calcium chloride solution can cause damage. Many caravanners use multiple traps in larger vehicles, placing them in the bedroom, bathroom and living areas to control moisture throughout the vehicle during storage.
What happens if you don't empty the Kontrol trap regularly?
Failing to empty the collection container when full means the crystals stop absorbing moisture once the container reaches capacity. The liquid can also overflow if the trap gets knocked over or moved, potentially damaging surfaces as calcium chloride solution is corrosive to metals and harmful to plants. Check the trap weekly during humid conditions and monthly during drier periods to maintain effective moisture control.
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If you’ve changed your mind about keeping your purchase, please return it in its original condition with proof of purchase and we’ll exchange or refund it. Unless faulty, this should be within 100 days of receiving your order. By original condition, we’d expect this to mean that you’ve kept packaging and labels, and that the item is undamaged and unused.

For further information of how to return your item, please visit the "Returning an Unwanted/Faulty/Damaged Item" section on our Help Page.
  Did you know we have been established and have been in the caravan and motorhome industry for over 50 years?

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