Using a 3/8” (10mm) microfiber roller, apply 3-4 generous coats of Foundation Sealant to entire surface, taking care not to allow the material to drip or puddle. For edges, corners or around pipes, apply product with a Nylon/Polyester brush. It should require around 3-4 heavy coats to achieve a 40-60 mil. (1-1.5mm) (DFT) membrane, allowing 6-8 hours dry time between coats depending on temperature and relative humidity. You can recoat once the material is dry to the touch with nothing wet underneath and uniform in color. Apply each coat at a right angle to the prior coat, to ensure even coverage. In a well-ventilated area with airflow, allow 24-48 hours curing after the final coat before the application of modified thinset and tiles. The coating should dry to the touch with nothing wet underneath and be uniform in color before installation of thinset and tile.