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How to Repair a Cracked Plexiglass Windshield?

Posted by Mariios on April 18, 2024

You first need to clean the area around the crack. You can use a soft cloth and mild soap to do that. Once the surface is clean, apply some acrylic glue or clear adhesive along the length of the crack. Gently press the edges of the crack together to ensure a secure bond, then let the glue dry. Once it is dry, carefully sand down any excess glue using sandpaper. And you’re done! If you find the process overwhelming or are not confident enough to perform it yourself, you may seek help from auto glass repair professionals.

5 Easy Ways To Repair Cracked Plexiglass Windshield

1. First, You Must Clean the Area

First, it is important to clean the cracked area before you start repairing the cracked plexiglass windshield yourself. You can use a clean, soft cloth and mild soap to clean the plexiglass.

Dampen the soft cloth with water and mild soap. Gently wipe the plexiglass surface in a circular motion to remove dirt and grime, then rinse the cloth and wipe the surface again to remove any soap residue.

2. You Can Use Acrylic Polish

If the cracks are really minor, you can use an acrylic polish. Apply some acrylic polish to the surface and rub it in circular motions. Now, clean the surface with a clean microfiber cloth. However, this procedure is not so effective. 

3. Buffing Compound is Another Option

Another effective method to repair a cracked plexiglass windshield is to use a buffing compound. Begin by putting a small amount of buffing compound on your windshield using a brush or towel. Use a dual-action polisher with a foam compounding pad to spread the buffing compound on the plexiglass. Work in straight lines, overlapping as you go. This helps ensure a smooth surface. 

4. Solvent Cement is a Great Way 

If the crack is small, you can use special solvent cement for acrylic to fix it. However, if the cracks are more significant, make a patch from plexiglass that’s a bit bigger than the crack.  Here is how you can repair a cracked plexiglass windshield using a solvent cement. 

  • Put the glue on the crack with a small tool or syringe, being careful not to use too much.
  • Hold the crack together while the glue dries. 
  • Once it’s dry, use clamps or strong tape to hold the edges together, but not too tight. 
  • Put something soft between the clamps and the plexiglass to protect it. 
  • After the glue is fully dry, use sandpaper to make the edges smooth. 
  • Start with rough sandpaper and finish with a smoother one. 
  • Finally, plastic polish and a soft cloth are used to make the plexiglass shiny again.

5. You Can Get it Replaced Professionally

If the cracks are major and cannot be fixed with the methods mentioned above. Consider getting it done by auto glass repair and replacement professionals. They have specialized equipment to effectively and precisely repair and replace the windshield. 

How do you repair cracks in clear plastic?

To repair cracks in clear plastic, you can use plastic glue, which is specially formulated to bond plastic surfaces. It is also used to make models.

How do you make plexiglass clear again?

To make the plexiglass clear again, apply a dot of acrylic glass polishing paste on the surface of the plexiglass and rub it in a circular motion using your hand or a cloth disc. However, do not do it for too long to avoid damage.

Can acrylic glass be repaired?

Acrylic might crack if it’s exposed to tough conditions for a long time. If the cracks are small, you can use a small drill bit to make holes on each side of the crack. Then, fill the crack with silicone sealant and wait for it to dry. This should fix the crack and make the acrylic look perfectly fine.


In short, you can repair minor cracks on the plexiglass windshield using an acrylic polish, a buffing compound, or a solvent cement. Be sure to clean the cracked area first to remove any dirt or debris. However, if the cracks are significant, make a patch from plexiglass that’s a bit bigger than the crack to fix it. 

If you are not confident enough to do it yourself or find the process overwhelming, or if the cracks are major, it is advised to seek professional assistance. The experts at Blue Diamond Auto Glass use advanced tools and procedures to ensure precision in the windshield repair process. Our technicians are highly skilled and experienced. Hence, you can have the peace of mind that your windshield is in expert hands. 

For more information, visit our website or contact us today to get more knowledge about our windshield repair process.


April 18, 2024
Written by
Blue Diamond Auto Glass
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