MasterSeal 581 White(formerly ThoroSeal) is a portland cement-based coating for concrete and masonry that provides protection against water, dampness and seepage. Mixed with MasterEmaco A 660, MasterSeal 581 creates a low maintenance and highly durable waterproof barrier that is NSF certified for potable water applications.

• Waterproofs and protects building interiors from dampness, moisture, or seepage.
• Ideal for interior or exterior, above or below grade; vertical, overhead and non traffic bearing surfaces.
• Fills and seals pores and voids to correct surface irregularities.
• NSF approved (white or gray products), use in potable water tanks.
• Resistant to mold and mildew.