MasterSeal 590 (formerly Waterplug) is a quick setting hydraulic cement used to instantly stop running water or seepage through holes or cracks in concrete and masonry and as an anchoring cement to secure bolts or posts in horizontal concrete or masonry. It expands as it sets to lock into place even under constant water pressure.

• Portland-cement-based repair mortar to repair holes or cracks flowing with water.
• Use above or under water or where water is flowing under constant pressure.
• Quick-setting, non-shrinking, permanent.
• Expands as it hardens to lock in place and form a perfect seal.
• Dries in 3 to 5 minutes.