Krystol Broadcast concrete waterproofing treatment is an alternative method of delivering crystalline waterproofing directly to the plastic slab. It uses a fugitive dye that allows finishers to see where the treatment has been applied, ensuring a consistent application rate. The product eliminates the need for slurry application to cured concrete slabs. Apply it to fresh concrete, then trowel it in. Kryton International Inc. 800-267-8280.