Can Broken Plexiglass Be Repaired?

Plexiglass, also known as acrylic or Perspex, is a durable and versatile material used in a variety of applications, from windows and skylights to displays and furniture. However, even the toughest plexiglass can crack or break under certain circumstances.

Stopping the Crack

If you have a cracked piece of plexiglass, the first step is to stop the crack from spreading further. This can be done by drilling a small hole, around 1/16″ to 1/8″ in diameter, at the end of the crack. This helps distribute the stress and prevent the crack from propagating.

Filling the Crack

Once the crack has been stopped, you can attempt to fill it in. One method is to use a specialized acrylic solvent cement, such as IPS WeldOn #3 (methylene chloride), which can help bond the cracked edges together. However, this can be tricky and may not work well if there is vibration or movement in the plexiglass.
Another option is to use a clear epoxy or acrylic adhesive to fill the crack. This can provide a more durable and long-lasting repair, but it’s important to follow the manufacturer’s instructions carefully and ensure the surfaces are properly cleaned and prepared.

Reinforcing the Crack

For larger or more severe cracks, you may need to reinforce the area by gluing a strip of plexiglass or other clear material over the crack. This can help strengthen the repair and prevent further cracking.

Replacement

If the crack is too extensive or the plexiglass is significantly compromised, it may be best to replace the entire piece. Consult with a professional if you’re unsure about the best course of action.