How to Make a Watertight Plastic Box

Written by kelly sundstrom
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How to Make a Watertight Plastic Box
You can make a watertight box with acrylic sheets. (Steve West/Digital Vision/Getty Images)

Plastic boxes can serve a wide variety of purposes, including storing personal items, organising files, or displaying a treasure such as a fossil that you found on a hike. If you want to display a delicate treasure, it is helpful to create a plastic display case that will be watertight. This will prevent water or air from entering the box and deteriorating the rare treasure inside of it.

Skill level:
Moderately Easy

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Things you need

  • Six acrylic sheets, each measuring 6 inches square
  • Clear silicone glue

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Instructions

  1. 1

    Place one of the squares onto a flat surface.

  2. 2

    Squeeze a line of clear silicone glue onto two opposing edges of the square.

  3. 3

    Press two more squares against the glued edges of the flat square, arranging them so that they are upright and against the edges. Allow the silicone glue to dry and harden completely.

  4. 4

    Squeeze a line of silicone glue around the edges of one end of the box form.

  5. 5

    Press another square piece against the glue, and hold it into place until the glue dries and hardens.

  6. 6

    Squeeze a line of silicone glue around the edges of the other end of the box form.

  7. 7

    Press another square piece against the glue, and hold it into place until the glue dries and hardens.

  8. 8

    Place your special treasure inside the box.

  9. 9

    Squeeze a line of silicone glue around the top edges of the box form.

  10. 10

    Place the remaining square onto the to of the box, and allow the glue to dry and harden.

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