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How to Repair Cracked Acrylic

A Complete Guide to Fixing Cracked Acrylic


If you work with acrylic, you probably already know the many benefits. Not only is it lightweight and durable, but it is also easy to work with and can be molded into different shapes. However, even the best acrylic can crack over time, either due to stress or accidental damage. Luckily, with a little know-how, it’s possible to repair cracked acrylic and restore it to its former glory.

In this post, we’ll go into more detail about the causes of acrylic cracks and provide step-by-step instructions on how to repair them. Whether you’re a do-it-yourselfer or a professional acrylic editor, this guide will help you keep your projects in tip-top condition for years to come.

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Why does acrylic break?

  1. Acrylic does not crack due to natural causes. As a rule, it cracks due to aging and external influences.
  2. Under normal conditions, cracks occur due to insufficient methyl methacrylate components, which cause thermal expansion and contraction. When it is hot in summer, the acrylic countertop melts like chocolate, and in winter it bends and cools, and the countertop shrinks and cracks precisely under the influence of an external force.
  3. If the temperature is too high, the main ingredient of acrylic is resin (polyoxyethylene or acrylic). , this composition changes at high temperatures and cracks.
  4. Acrylic has some cracks after cutting, and these cracks can be polished after filling.

Types of Acrylic Cracks:

Not all acrylic cracks are the same. Understanding the type of crack you’re facing is key to choosing the right repair method. Here are some common types of acrylic cracks:

Cracks on the surface:

These are surface cracks that do not penetrate the entire thickness of the acrylic. They can be caused by heat stress or aging.

Stress cracks:

These are small cracks that can appear on the edges of acrylic sheets or near holes or indentations. They are often caused by physical exposure or heat stress.

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It is a type of crack that appears as a network of fine lines on the surface of acrylic. It is caused by chemical stress or exposure to ultraviolet radiation.

Acrylic Scrap:

This is a severe form of cracking that occurs when acrylic is subjected to extreme physical trauma, such as falling from a great height.

Step-by-Step Guide to Repairing Cracked Acrylic:

How do you repair and maintain acrylic after cracks?

  1. If it is a small crack, it can be fixed by heating the torn part with a gun or hair dryer, but this can only cure the symptoms, not the cause.
  2. If it is accidentally cracked or completely cracked, it can be bonded with chloroform or dichloromethane, and the strength after welding is sufficient. You can also buy professional acrylic glue from repair material vendors.
  3. Acrylic is tear-resistant and easy to break, and care should be taken to protect the surface when handling it. If the acrylic product is not damaged, IPS glue/methylene chloride glue or quick-drying glue can be used.
  4. Avoid high temperatures. Acrylic deforms when heated to about 70 degrees and softens when heated above 100 degrees. For parts over 100 degrees, this should be avoided.
  5. Scratch reduction, acrylic polishing. If it is a small scratch, you can wipe it directly with toilet paper or a cloth soaked in a little toothpaste. If it is a large scratch, it is recommended to rub the acrylic with sandpaper. Sanding tears off the product and scratches the entire surface.
  6. Avoid using chemical cleaners. AL should be rubbed off with a soft cloth. Never use detergents that contain particles and never wash them with different chemical baths.

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If you have more information and questions about acrylic, please feel free to contact Jinbao.


Repairing cracked AL may seem like a daunting task, but with the right tools and materials, it can be an easy process. By following these simple steps, you can restore your AL surface to its former glory and avoid costly replacement. Remember to always take precautions when handling chemical and power tools and carefully follow the manufacturer’s instructions.

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