The Hydrosnake & Hydrosacks form water-reactive temporary flood barriers for low-level flooding. Constructed from a non-woven outer material with a super absorbent core. Once they come into contact with water they can absorb up to 20 litres. This is all thanks to the core which contains a mixture of superabsorbent polymer and wood pulp. Providing instant defence against flooding and redirection of floodwater.

Before use, the Hydrosnake and Hydrosack weigh less than 0.5kg. However, once in contact with water they become as heavy as 20.5kg!

Each Hydrosnake measures up to 1.45m in length when activated, making it the ideal flood barrier for warehouse doors/shutters and domestic doorways.

• Absorbs up to 20kg of water in 2-3 minutes
• Dimensions – 250(W)x1450(L)mm
• Available in Packs of 2 Units

The Hydrosacks handles allow minimal contact and allow easy positioning of the barrier, making them an ideal replacement for the traditional sandbag in forming a flood protection barrier. After use, the outer sack can be slit and the contents can be emptied into the earth without harmful effects.

• Absorbs up to 20kg of water in 2-3 minutes
• Dimensions – 480(W)x600(L)mm
• Available in Packs of 2 Units 

How long can they be stored?

5+ years if stored in their original packaging and kept dry.

How can I inflate/activate them?

The quickest way to fully activate HydroSack®s/HydroSnake®s is to soak them in water using a bucket or tub of water and this will take 2-3 mins per unit. They can also be activated by spraying with a hose, or pouring water onto them, but will take slightly longer than soaking.

Can I use floodwater to activate them?

We would always recommend activating them before laying them in place as:

1. The HydroSack®s/HydroSnake®s weigh very little before saturation with water, so may move out of position if left dry
2. If activated by flood-water, they are more dangerous to handle/dispose of than those activated by fresh water from a tap/hose as flood-water can be heavily contaminated.
3. If stacking a flood barrier with multiple layers, the HydroSack®s/HydroSnake®s may not swell to their full size if left to absorb only flood-water

How do I dispose of them once used?

To dispose of a HydroSack®️/HydroSnake®️, simply split the outer bag and the contents can be poured into the ground, and will degrade in a matter of weeks. Ecological studies have shown that the contents pose no negative risk to the environment or wildlife.

They contain a mixture of Super Absorbent Polymer (SAP) and FSC (sustainably sourced) wood pulp. SAP is a compound used in disposable diapers and other super absorbent products. The SAP used in HydroSack®s and HydroSnake®s was specifically chosen for its eco-friendly nature, as there are other super absorbent compounds (and therefore other products utilising them in the market) that can be harmful to the environment, and are even banned in some countries.

What makes them swell?

They contain a mixture of Super Absorbent Polymer (SAP) and FSC (sustainably sourced) wood pulp. SAP is a compound used in disposable diapers and other super absorbent products. The SAP used in HydroSack®s and HydroSnake®s was specifically chosen for its eco-friendly nature, as there are other super absorbent compounds (and therefore other products utilising them in the market) that can be harmful to the environment, and are even banned in some countries.