Q: How to use?
A: 1. Place the dry barrier on the inner side of the entrance to allow water pressure to create a seal. 2. Lay multiple bars to cover the opening width, overlapping edges if needed. 3. Activate with a hose/rainwater–expands to 3–4 inches in 3–5 min.

Q: Can it be reused?
Yes. Reusable after sun-drying–requires drying under sunlight before rolling flat. Water absorption capacity may decrease with use due to environmental factors like sediment, salt, exposure, or wear. Inspect before reuse; replace if damaged/aged.

Q: What should I pay attention to?
A: 1. Not suitable for fast-flowing water or long-term fixed protection. 2. Works on flat surfaces (concrete/tiles/asphalt); avoid sharp objects. 3. Must be thoroughly dried before storage – drying time varies by climate.