MasterSeal 590: One-component, cement-based, fast-setting water-stop repair mortar

Formerly: Waterplug

MasterSeal 590 Application Guidelines     MasterSeal 590 Sell Sheet

How does MasterSeal 590 work?

MasterSeal 590 is a one-component, quick-setting, portland-cement-based hydraulic repair mortar that instantly stops running water through holes or cracks in concrete or masonry. It expands as it sets to lock into place even under constant water pressure.


Recommended uses:

  • Nonmoving (static) cracks and holes with running water or moisture seepage
  • For immersion service
  • For anchoring vertical bolts
  • Basements
  • Foundations
  • Retaining walls
  • Sewers

What are the features of MasterSeal 590?

  • Fast-setting
  • Fully hydraulic
  • Shrinkage compensated
  • One-component
  • Ready to topcoat in 15 minutes with appropriate product
  • Durable nonmetallic, non-gypsum formula
  • Formulation available for cold-weather applications

What are the benefits of MasterSeal 590?

  • Stops running water; develops high-strength quickly
  • Sets above or below water
  • Expands to lock in place
  • Mixes easily with water only
  • Minimizes downtime
  • Maintains volume stability over time
  • Use in all seasons and climates

US / Canada Product Information

Data Guide

Data Guide (Spanish)

Certification Letter

Direct contact

Master Builders Solutions Technical Support

Construction Systems


Safety Data Sheet (SDS)

Find all available safety data sheets for this product.

Product Certifications

Generate a free certificate of conformance for a specific BASF construction product.

Related Literature

Certification Letter

pdf (55.35 Kb)

Data Guide

pdf (101.21 Kb)

Data Guide (Spanish)

pdf (128.20 Kb)