What activates an EWARP soft patch?

An EWARP, or Emergency Water Activation Repair Patch, is designed to seal leaks in pipes and other water systems. The patch is made from a material that, when exposed to water, particularly salt water, activates its reactive properties. In maritime environments, especially on naval vessels, it is common for salt water to be readily available and used for such emergency repairs.

When the EWARP patch comes into contact with salt water, it absorbs the moisture and undergoes a chemical reaction that causes it to expand and form a strong, water-tight seal. This ability to activate and create an effective barrier is critical for damage control teams tasked with minimizing water ingress during emergencies. While fresh water may also activate the patch, the use of salt water as the answer emphasizes the operational context of the EWARP in maritime applications, where salt water is often more accessible in emergencies.