How to Make a Sink Mold

Casting a Sink

• 1

  Measure the sink to determine the board size.

• 2

  Center the sink basin on the acrylic board.

• 3

  Outline the sink on the board with the pencil.

• 4

  Drill a hole in the board on the interior edge of the circle and cut out the drawn hole with the jigsaw. This will serve as a spacer board.

• 5

  Place the sink on a baseboard and place the spacer board on top of that board over the sink.

• 6

  Mark the alignment on the boards with a single line using the marker.

• 7

  Remove the spacer board and create a gasket with the modeling clay around the perimeter of the sink. This will prevent rubber from leaking while the mold forms. Realign the spacer board onto the gasket.

• 8

  Screw the boards together or use acorn nuts to attach them.

• 9

  Assemble the walls of the mold box with screws.

• 10

  Seal the seams of the box with the hot glue gun and plug up any screw holes with the clay.

• 11

  Spray the sink with mold release.

• 12

  Mix rubber molding in the 5-gallon bucket.

• 13

  Pour the molding over the sink.

• 14

  Attach the reverse base board and allow the mold to dry for 16 hours.

• 15

  Remove the surrounding boards once the molding has cured. Remove the sink. The molds are complete and ready to cast.