How To Apply Mortar Over A Pond Liner

Step 1

Mix the mortar in a ration of three parts sand and one part plastic cement. Add in 1 ½ parts of concrete reinforcement to add stability to the mix. Mix the ingredients in a large container. Add in enough water to create a mud-like paste.

Step 2

Spread the mortar over the liner with the flat trowel. Spread the cement to a thickness of about 1 inch.

Step 3

Press large rocks into the mortar to create borders and shelves for plants or fish. Press the rocks around the edges of the mortar to hold them in place. Spread a thin layer of mortar between the rocks for additional bonding and to create a water-tight seal between the rocks.

Step 4

Step 5

Water the surface of the mortar every hour. The cement must stay damp throughout the entire curing process or else it will crack.

Step 6

Seal the mortar with a cement sealer. Apply the sealer with a paintbrush. Allow the sealer to dry for 24 hours.

Step 7

Fill the pond with water as soon as the concrete sealer dries. This is the best way to maintain the strength of the cement inside the pond.

Step 8