​​MasterSeal 581

​A waterproof cement-based coating for concrete and maso​nry

Formerly: Thoroseal

MasterSeal 581 Application Guidelines     MasterSeal 581 Sell Sheet

How does MasterSeal 581 w​​​ork?

MasterSeal 581 is a portland cement-based coating for concrete and masonry that resists both positive and negative hydrostatic pressure.​ Polymer-modified with MasterEmaco A 660, MasterSeal 581 creates a low maintenance and highly durable waterproof barrier.


Recommended uses:

  • Vertical and light-pedestrian horizontal surfaces
  • Interior and exterior
  • Above and below grade
  • Alternative to mechanical finishing or rubbing of concrete
  • Waterproofing basement and retaining walls
  • Foundations
  • Bridges and tunnels (non- traffic barring surface)
  • Water cisterns

What are the uniq​​ue features of MasterSeal 581?

  • Waterproof to help protect building interiors from dampness and moisture damage
  • Breathable, allowing interior moisture to escape without damaging coating

What are the benefits of MasterSeal 581?

  • Resistant to both positive and negative hydrostatic pressure, making MasterSeal 581 suitable for use below grade interior and exterior and in water treatment construction
  • Compatible with high-performance coatings, including a wide range of architectural coatings and textured finishes
  • Hides minor surface defects and blemishes in architectural concrete
  • Available in ten landscape colors and custom colors (with minimum order quantities)

US / Canada Pr​oduct Information

Data Guide

Data Guide (French)

Guide Spec

Certification Letter

LEED Letter

LEED v4 Letter

Safety Data​​ Sheets (SDS):

Master​​Seal 581 - Gray

MasterSeal 581 - Pearl Gray

MasterSeal 581 - Special

MasterSeal 581 - White

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 (55.32 Kb)

Data Guide

pdf (106.62 Kb)

Data Guide (French)

pdf (196.30 Kb)

Guide Spec

doc (99.14 Kb)

LEED Letter

pdf (51.59 Kb)

LEED v4 Letter

pdf (69.98 Kb)