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What is Water Plug Cement?

Published in Hydraulic Cement Mortar 2 mins read

Water plug cement, such as THORO WATERPLUG®, is a specialized type of mortar designed specifically to stop active water leaks in concrete or masonry structures.

Based on the provided reference, here's a breakdown of its key characteristics and function:

Key Features of Water Plug Cement

This type of product is engineered for rapid response to water intrusion. Its composition and properties make it highly effective for urgent repairs:

  • Composition: It is a one-component, Portland-cement-based hydraulic repair mortar. This means it requires only the addition of water (it's "one-component") and hardens through a chemical reaction with water (it's "hydraulic"), utilizing Portland cement as the base material.
  • Setting Time: It is quick-setting. This is crucial for stopping running water instantly.
  • Action: It is designed to instantly stop running water through holes or cracks in concrete or masonry.
  • Unique Property: It expands as it sets. This expansion helps it to tightly lock into place within the crack or hole, even when subjected to constant water pressure.
  • Application Flexibility: It can be applied underwater, which is essential for repairing leaks below the waterline or in persistently wet environments.

How Water Plug Cement Works

When mixed with water and applied to a crack or hole with active water flow, the quick-setting nature allows it to solidify rapidly. The hydraulic properties mean it cures even in the presence of water. The unique expansive quality creates a tight seal, effectively blocking the path of the water and providing a durable patch even under pressure.

Typical Uses

While the reference specifically details THORO WATERPLUG®, the description points to common applications for this type of material:

  • Sealing active leaks in basement walls
  • Repairing cracks in concrete foundations
  • Patching holes in manholes or concrete pipes
  • Stopping water flow around pipe penetrations
  • Underwater repairs to concrete or masonry structures

Summary of Properties

Feature Description Benefit
Type One-component, Portland-cement-based hydraulic mortar Easy to mix and use, cures in wet conditions
Setting Quick-setting Stops water instantly
Function Stops running water through holes/cracks in concrete/masonry Effective for active leaks
Setting Behavior Expands as it sets Creates a tight, pressure-resistant seal
Application Can be applied underwater Versatile for various wet environments

Water plug cement is a specialized, fast-acting hydraulic mortar formulated to provide an immediate solution for stopping active water leaks in rigid structures like concrete and masonry.