Description
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.






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