The Water Tight Door is a structure that prevents inundation damage caused by weather disturbances such as typhoons or heavy rainfall and reverse flow of foul water. It also protects human life and property in flood-prone regions. In addition to its function as a gateway (including doorway, emergency exit, lighting, and ventilation), the Water-Tight Door can resist high water pressure and prevent inundation.

It is often used as an interior connecting path, a transit path, and a doorway in a subway or building, and a main facility to protect inundation for the navy.
It is resistant to corrosion from sea water, durable against wind and water pressure, and is water tight. Its size and shape depend on the water level of the site.
This Water-Proof Door is the most effective alternative plan to protect from inundations for existing and new buildings, reduce the extent of flood damage, and is also easy on the budget.

The Water Proof Door, when closed, is guaranteed to have no vibration under all operational circumstances and completely leak-free. Moreover, assembly of the parts should be done with care, as mistakes can affect its strength and water tightness.
For the Water-Tight Door to be installed on the main entrance of a building or on the inner path of a subway line, where constant passage of people requires it to remain open, it is advised to equip it with stainless material patterns for the purpose of interior decorative enhancement aside from its function as a water-proof door.

The water-proofing type is done using a pressure-type Gasket Method, with an integrated, four-sided water-tight structure.
The company acquired the patent on unlocking device for complete water proofing, thereby making our products superior in quality and performance.

The Water-Proof Door and its auxiliary facilities must meet the following requirements.
1) Sufficient safety on expected weight.
2) Perfect water tightness.
3) Easy and exact operation during opening and closing.
4) Sufficient durability.
5) Easy maintenance and repair.

It is expected that the Water-Proof Door will be used mainly on the entrance of new apartments and in basement parking lots in the southern region of the country.
In addition, the Water-Proof Door will be much likely used as part of the countermeasures in preventing damage due to frequent typhoons and heavy rainfall.