MasterSeal 590, formerly Waterplug

A 1-component hydraulic cement-based, fast-setting, patching mortar that instantly stops running water or moisture seepage through holes or cracks in concrete and masonry walls. Place material within 30-60 seconds after mixing. Will not shrink or oxidize and is suitable for water immersion service when cured.

(Formerly Thoro Waterplug)

Advantages: 

• Fast setting so it can stop running water and develops high strength quickly
• Fully hydraulic so it can set above or below water
• Shrinkage compensated so it expands to lock in place
• One component so it mixes easily with water only
• Ready to topcoat in 15 minutes with appropriate product to minimize downtime
• Durable non-metallic, non-gypsum formula to maintain volume stability over time
• MasterSeal formulation available for coldweather applications for use in all seasons and climates
• Certified to the NSF/ANSI Standard 61 for potable water contact

Limitations: Do not apply to moving (dynamic) cracks, do not use to fill expansion joints or control joints.