This product contains Corrosive Materials and will ship "Hazmat" through FedEx Ground. Hazmat shipping prices have been added to the cost of this product. This product is not eligible for next day, second day or 3 day select shipping if either are selected the order will be shipped standard ground. This product is also available for purchase without the Hazmat prices at our Warehouse. Please contact us to learn more: (850) 835-4052 (Learn more about our Hazmat Shipping rules and regulations)

White Scum Presoak is designed as a pre-soak to facilitate the removal of white scum on block, brick or concrete. White Scum Presoak followed with NMD 80 can be used to remove calcite from concrete masonry units (CMU).
Used in conjunction with NMD 80, this combination will ensure the complete removal of white scum.

White Scum Presoak provides powerful penetration and softening action of white scum.

First apply the White Scum Presoak undiluted and allow it to dwell on the deposit only for approximately five to ten minutes. Apply NMD 80 diluted four parts water to one part solution (4:1) without rinsing off the White Scum Presoak; allow a five to ten minute dwell time. Rinse completely with a pressure washer to get the desired results. Repeat as necessary.