: Immediately cover the drain with a stopper or damp cloth to force the foaming reaction downward. Let it sit for 15 to 30 minutes (up to an hour for tough clogs).
To keep drains clear:
For , you may need a plunger or mechanical snake first. Bicarb works best for partial clogs and maintenance. clearing blocked drains with bicarbonate of soda
For grease-based clogs:
Pour of dry bicarbonate of soda directly into the drain opening. If the drain has a narrow opening, use a funnel or fold a piece of paper to guide it. : Immediately cover the drain with a stopper