Damage to the internal plastic of the refrigerator compartment is a common problem faced by owners of equipment of different brands. Cracks, chips or holes often occur due to careless defrosting with a sharp object or due to mechanical shock from heavy products. This defect cannot be ignored, since a violation of the tightness leads to cold leakage, ice formation and accelerated spoilage of products.
Restoring integrity internal chamber requires the right approach to the selection of materials. Ordinary adhesive tape or tape will not help here - they will not withstand low temperatures and will quickly peel off. In this article, we will look at what compositions really work, how to prepare the surface and step-by-step repairs with your own hands.
Timely sealing damaged area allows you to extend the life of the unit and avoid costly repairs with the replacement of the entire internal panel. It is only important to choose a chemically compatible material that is non-toxic and resistant to constant temperature changes.
Causes of defects and damage assessment
Before starting repairs, you need to understand the nature of the damage. Most often, cracks are formed due to impact. For example, when defrosting, many people use a knife or spatula to quickly break the ice. A blow to evaporator or the chamber wall often results in the appearance of a long crack or through hole.
Another reason may be thermal stress. If the plastic is old and has lost its elasticity, a sudden change in temperature can cause it to crack. Defects also occur when heavy glass jars or metal pans fall onto the refrigerator shelf.
⚠️ Attention: If you hear a hissing sound immediately after the impact, this may indicate damage to the cooling system. In this case, the question “what to seal with” is no longer relevant - you need to call a specialist to fill with freon and seal the pipes.
Assess the scale of the destruction. If it is a superficial scratch, repair may not be necessary. However, if the crack is deep or through, moisture will penetrate into the insulation through it, which will lead to corrosion and mold. Internal plastic performs not only an aesthetic, but also a thermal insulation function.
Choosing a suitable adhesive
The main difficulty of repair is the aggressive operating environment. The temperature and humidity inside the chamber are constantly changing. Therefore, regular superglue (cyanoacrylate) is not the best choice. It becomes brittle in the cold and may crack after a few weeks.
The most effective solution is to use two-component epoxy resins. They create a strong, chemically resistant connection that is not afraid of moisture and cold. Specialized silicone-based food sealants have also proven themselves well, although their adhesion to some types of plastic may be lower.
When choosing a material, pay attention to the following characteristics:
- 🧊 Temperature range: the composition must maintain elasticity at temperatures from -25°C to +50°C.
- 🍏 Safety: after complete drying, the glue should not emit toxins, as it is located next to the products.
- 💧 Moisture resistance: the material must withstand constant condensation and contact with water.
Compositions based on polyurethaneperform well. They have high adhesion to ABS plastic, from which the internal casing of refrigerators is most often made. It is important that the glue, after hardening, is inert and does not react with fats or acids contained in products. Indesit, Atlant And Beko. It is important that the glue, after hardening, is inert and does not react with fats or acids contained in products.
Preparation of the surface for repair
The quality of gluing depends 80% on surface preparation. Even the most expensive one epoxy glue will not stick to the greasy or damp wall of the refrigerator. The first step is to completely defrost the unit and disconnect it from the network.
Wash the damaged area thoroughly with warm water and a neutral detergent. After drying, be sure to degrease the repair area. To do this, use alcohol, acetone or a special degreaser. Rub until the cotton wool or napkin stops getting dirty.
☑️ Preparation for gluing
If the edges of the crack are uneven or there are burrs, they need to be carefully cleaned with fine sandpaper. This will increase the area where the glue adheres to the plastic. For through holes, it may be necessary to install a patch on the inside of the case.
Do not forget about safety when working with chemicals. Ensure that the area is ventilated as solvent vapors may be harmful. After treatment, allow the surface to dry completely before applying the adhesive composition.
Technology for sealing cracks and holes
The restoration process depends on the type of damage. For thin cracks, the method of “welding” with hot air is often used, followed by applying glue, but at home it is safer to use cold welding or epoxy.
If you are using two-component glue, mix the components in the proportion indicated by the manufacturer on the package. Usually it is 1:1 or 1:10. Mix the mixture thoroughly until smooth. Apply the glue in a thin layer, slightly overlapping the entire edges of the plastic.
⚠️ Attention: Do not apply too thick a layer of glue. When it hardens, it can shrink or, conversely, expand, which will lead to deformation of the thin wall of the refrigerator.
For through holes, it is better to use the “sandwich” technique. A patch is placed on the inside (on the insulation side, if there is access, or directly on the plastic). The outside of the crack is filled with glue. The pressure on the wall must be fixed until complete polymerization.
Drying time differs for different materials. Quick adhesives set in 5-10 minutes, but gain full strength after 24 hours. Do not rush to turn on the refrigerator ahead of time - polymerization it must go through completely, otherwise the seam may separate during the first cooling cycle.
What to do if the crack is long?
For long cracks, it is recommended to drill with a thin drill (1-1.5 mm) holes at the ends of the crack. This will relieve stress in the plastic and prevent further spreading of the defect under the influence of temperature expansion.
Comparison of materials for repair
To make it easier for you to make your choice, we have prepared a comparison table of the main materials. Each of them has its pros and cons in the context of repairing refrigeration equipment.
| Material | Seam strength | Frost resistance | Drying time | Toxicity |
|---|---|---|---|---|
| Epoxy resin | High | Excellent | 12-24 hours | Average (up to hardening) |
| Food grade silicone | Average | Good | 24 hours | Low |
| Cyanacrylate (Superglue) | Low (brittle) | Bad | 1-5 minutes | High (vapors) |
| Cold welding | Very high | Excellent | 4-6 hours | Average |
As can be seen from the table, epoxy compounds and cold welding lead in reliability. Silicone is good for sealing joints, but does not hold mechanical load well. It is better to completely exclude cyanoacrylate adhesives from the list of candidates for refrigerator repair.
When working with “cold welding”, it fills any unevenness and after hardening it becomes hard as a stone. This is an excellent option for repairing corner chips.
Completing the work and checking the result
After the glue is applied and fixed, the waiting period begins. Do not touch the repaired area, do not try to test it “by the tooth”. Violation of the drying regime is the most common cause of repeated breakdowns.
When the recommended time is up, carefully inspect the seam. It must be monolithic, without bubbles or peeling. If you used clear glue, it should not become cloudy. The remaining glue that has protruded can be carefully cut off with a blade.
Now you can turn on the refrigerator. On the first day, do not load the chamber with food. Allow the unit to enter operating mode. Keep an eye on the repair site: if condensation or frost appears at this particular point, it means that the seal has been broken and the procedure will have to be repeated.
⚠️ Attention: If after the repair a strong chemical smell appears that does not disappear within 2-3 days, you cannot use the refrigerator for storing food. It is possible that the glue used is not intended for food purposes.
Properly performed repairs allow you to forget about the problem for many years. The plastic of the restored area is often even stronger than it was originally. The main thing is not to skimp on materials and follow technology.
Is it possible to use regular sealant for bathtubs?
It is not recommended to use sanitary sealant for bathtubs. It often contains fungicides (antiseptics), which are toxic and can migrate into foods. In addition, the adhesion of plumbing sealants to the smooth ABS plastic of refrigerators is often weak.
How long does the glue dry inside the refrigerator?
The time for complete polymerization depends on the temperature. At room temperature, most epoxies dry within 24 hours. Inside a working refrigerator, the process may proceed more slowly or not at all, so you need to dry the glue at room temperature before turning on the device.
Is it dangerous if the glue touches the food?
After complete polymerization, high-quality epoxy glue or cold welding are inert and safe. However, if you are not sure about the quality of the material or the drying time, it is better not to take risks and cover the repair area with cling film or parchment until you are completely sure of the result.