Home Owners
The barrier you will actually use
Traditional sandbags and heavy panels require a team to install. It is often so discouraging that people wait until it's too late or just hope that the storm is not going to be the one.
FlowStop changes everything. It is incredibly lightweight, easy to handle, and sets up in minutes with a simple air pump. No heavy lifting, no tools—just absolute protection at a moment's notice.
Designed for all Openings
Every FlowStop barrier is custom-engineered to fit your property’s exact openings: from standard doors to wide garage bays, sliding glass tracks and low windows.
Our system relies on internal air pressure to expand and lock securely against your existing structural frames, giving you a watertight seal. If an entryway lacks a natural frame or parallel walls to push against, don't worry—our team can design and install a custom framing solution to ensure a perfect, airtight fit.
Hardcore Flood Defense: Strong & performant
In 2025, FlowStop underwent rigorous independent testing by the National Research Council (NRC), a premier Canadian government agency. The NRC evaluated 16 different flood barriers against extreme conditions, including rising tides, heavy wave actions, and high-velocity water levels. FlowStop outperformed the competition, achieving the top marks in the study.
This elite performance is a direct result of our inflatable engineering. Unlike rigid metal or plastic systems, FlowStop expands to flawlessly conform to uneven walls, textured floors, and surface cracks—creating a completely airtight, watertight micro-seal.
Furthermore, this pressurized design offers superior impact resilience. When heavy floating debris strikes traditional panels, the shock can bend the metal or rupture the seal. With Flowstop, debris simply bounces off, absorbing and deflecting the kinetic energy while keeping your property’s defense line completely intact.
Patented technology with a US manufacturing
2019 | The Breakthrough
Flowstop is invented by Olivier Guillou in France, pioneering a revolutionary approach to inflatable, tool-free flood barrier.
2021–2022 | Patent & Launch
Flowstop files its foundational patent and officially hits the market, changing how properties prepare for storms.
2024 | Critical Infrastructure Trust
Flowstop scales to protect high-stakes assets, including nuclear power plants, French highway networks, and municipalities, while forming strategic partnerships with major European insurance providers.
2024 | Standing Tall in the US
Flowstop expands to the United States. Our barriers were put to the ultimate test on the front lines, successfully saving countless homes from devastating storm surges during Hurricanes Helene and Milton.
2026 | Built in America
To meet surging demand and support rapid domestic deployment, Flowstop proudly opens its dedicated US manufacturing facility, delivering elite-grade, locally produced flood defense systems.
Every house is different
Whether your house is made of block, brick, or framed, it will affect your flood proofing strategy.
Contact us for a free on-site visit with a flood expert.