Seal the mortar with a cement sealer. Apply the sealer with a paintbrush. Allow the sealer to dry for 24 hours. Fill the pond with water as soon as the concrete sealer dries. This is the best way to ...

They drained the pond and the most recent step they laid down bentonite to help seal the pool. After the bentonite is put down and mixed into the clay surface the process of filling the pond ...