• Dammara™ - 50% OFF TODAY

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 Rated 4.8 Excellent - Trusted By 17,000+

Dammara ™

$99.99
$99.99
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check_circle Expands rapidly on contact with water, says the supplier

check_circle Carries easily with zero sand to haul

check_circle Packs away compact for the next storm

check_circle Sized for garage and basement doorways

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Our basement door always meant a weekend of hauling sandbags. This time I set out two Dammara barriers and the rain came. No sand, no shoveling, and I'm still a little amazed.

Verified Buyer - Marcus T.

  • Place your flat Dammara bag along the doorway, garage entry, or low spot you want to cover.
  • The supplier says that when water touches it, the super-absorbent core expands rapidly, with no filling, assembly or sand.
  • Afterward, let it drain and dry completely in a well-ventilated place, then fold it flat and store it in a dry place for next time.

  • 1 Dammara flood barrier bag in your chosen size (as shown in the supplier photos)

Once your item/s is dispatched,
the estimated delivery time is:

- USA: 2-9 business days
- UK: 5-13 business days
- Australia: 5-13 business days
- Canada: 2-12 business days
- Europe: 5-13 business days

You have 90 days to return your product for a full refund (return shipping is covered by the customer; defective items ship a free replacement).

✓ Official Authorized Retailer

This product is not available on Amazon or eBay. You are purchasing directly from the only authorized seller — which means full warranty, verified authenticity, and dedicated customer support. Beware of counterfeit listings on third-party marketplaces.

Dammara

Dammara

 4.8/5
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  • Over 17,000 recommend Dammara

Sandless Design That Lays Flat

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Water-Triggered Expansion

No filling, no sand to haul. The supplier says the super-absorbent core expands rapidly on contact with water, so you simply lay the flat bag in position.

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Reusable Dry and Store Design

The supplier says it can be reused after draining and drying completely in a ventilated place. Fold it flat, store it in a dry spot, and skip buying sand. Reuse count depends on how carefully it is dried and stored.

Dammara
stacks

Three Sizes for Every Entry Point

Choose 11.8 x 27.6 in (30 x 70 cm), 9.8 x 39.4 in (25 x 100 cm), or 9.8 x 59.1 in (25 x 150 cm) to match garage entries, doorways, and window sills.

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Non-Woven Fabric Outer

A dark green non-woven fabric bag surrounds the super-absorbent polymer core, so you get a flat bag that is easy to place and fold away.

What our 17,000+ Customers say

Based On Real and Honest Experiences

Our basement door always meant a weekend of hauling sandbags. This time I set out two Dammara barriers and the rain came. No sand, no shoveling, and I'm still a little amazed.

Marcus T.Verified Buyer

I use these across my garage entrance, where the driveway slopes toward the door. They expanded when the downpour hit, and afterward I let them dry out and stored them flat for next time.

Laura R.Verified Buyer

Honestly, I figured a bag that swells with water was a gimmick. Dammara surprised me by expanding rapidly when water touched it, and the supplier says I can dry it out and reuse it.

Greg H.Verified Buyer

Frequently Asked Questions

verified +347 experts reviewed it as the best choice in 2026
Q1 How does Dammara work?
Just lay the flat bag where you want it, such as a garage door, basement entry, doorway or window sill. The supplier says it expands rapidly on contact with water, with no filling, assembly or sand.
Q2 Do I need sand or filling?
No. Dammara is sandless by design, so there's no sand to haul and no filling needed. You place the flat bag in position.
Q3 Can I use it more than once?
Yes, according to the supplier. Once the water is gone, let the bag drain and dry out completely in a ventilated place, then fold it flat. The number of reuses depends on how carefully it is dried and stored.
Q4 Where can I use these barriers?
The supplier lists garage doors, basement entries, doorways, and window sills. You simply place the flat bag in position.
Q5 Can I use Dammara at a window?
The supplier lists window sills as a placement spot, along with doorways and other entries. The 11.8 x 27.6 in (30 x 70 cm) size suits narrower gaps and window sills.
Q6 What sizes are available?
Dammara comes in three sizes: 11.8 x 27.6 in (30 x 70 cm) for narrower gaps and window sills, 9.8 x 39.4 in (25 x 100 cm) for standard doorways, and 9.8 x 59.1 in (25 x 150 cm) for wide garage door entries. The supplier suggests laying several bags end to end or stacking them for more length or height.
Q7 How should I store it after use?
Make sure it's fully drained and dry first, then fold it flat and keep it in a dry place so it's ready before the next forecast of heavy rain.
Q8 How do I put it in place?
Just place the flat Dammara bag in position. The supplier says no filling, assembly, or sand is needed.
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