MasterSeal 581 is a Portland cement-based waterproof coating designed for concrete and masonry surfaces. It resists both positive and negative hydrostatic pressure, helping to keep water out even when moisture is pushing from either side of the structure.

Polymer-modified with MasterEmaco A 660, MasterSeal 581 creates a low-maintenance, highly durable waterproof barrier that protects building interiors from dampness, moisture, and seepage.

Features & Benefits

• Portland cement-based coating for concrete and masonry

• Resists both positive and negative hydrostatic pressure

• Polymer-modified with MasterEmaco A 660 for enhanced performance

• Creates a durable, low-maintenance waterproof barrier

• Breathable coating allows interior moisture to escape without damaging the surface

• Compatible with many high-performance architectural coatings and finishes

Typical Applications

• Basements and foundation walls

• Retaining walls and below-grade structures

• Interior and exterior masonry and concrete

• Water cisterns, tanks, and other water-retaining structures (when mixed and applied as directed)