Feb Febtank Plug Rapid Setting Water Stop Repair Compound is an ultra-rapid setting, durable plugging compound designed to stop active water leaks in concrete and masonry. Once applied, the material expands as it cures to form a permanent watertight seal with similar characteristics to concrete. Febtank Plug is also suitable for the rapid anchoring of bolts, conduits, pipes, railings, sanitary equipment, etc. As well as joint filling, pointing between concrete segments in concrete and brick tunnels, sewage systems, pipes and mines. Febtank plug can also be used for sealing cracks and construction joints in reservoirs and other water retaining structures.