The best material for washing the car radiator has several important features; First of all, it should not destroy the antifreeze or damage the water pump and washer and with the material of the radiator. car also compatible. The second feature is properties such as rust removal and sedimentation, and finally buying from reputable brands with standard packaging and seals. When using, be sure to pay attention to points such as emptying the liquid before, time of use and turning on the car after use. For your convenience, in this article from Digikala Mag, we have reviewed the popular and well-known models in the market and based on the key criteria and the comparison table, we have introduced the best material for washing the car radiator.
Criteria for choosing the best radiator washing material from the point of view of Digikala Mag
- The power of removing deposits and rust: The right detergent should be able to remove lime deposits, oil and rust inside the radiator without damaging the metal structure.
- Compatibility with radiator material: Some cars have aluminum or plastic radiators. Therefore, it is important to choose a detergent that is compatible with both sexes.
- Safe for cooling system: The detergent should not change the antifreeze properties, damage the water pump or the cylinder head gasket.
- Without causing corrosion or decay: Formulas with anti-corrosive substances are the best choice to increase the life of the system.
- Authentic brand and approved by repairers: Products such as K2, Istab and Dirgun have passed their test in mechanical workshops for years.
- Ease of use: Ready-to-use liquids, unlike powders, can be used without mixing with water and shorten the service time.
Comparison table of the best radiator washing materials
| Product name | Manufacturer | Cleaning power | Can be used for | Volume |
| Radiator stop leak supplement K2 model Radiator Stop Leak | K2 (Poland) | up | All cars | 400 ml |
| Istab model G radiator leak stopper | Istab (Iran) | average | All cars | 200 ml |
| Dirgon radiator washing solution model DG-15 | Dirgun (Iran) | up | All cars | 354 ml |
Introducing the best car radiator washing materials
The following three products from K2, Istab and Dirgun brands are among the most effective options in the market, each of which is designed for a specific need, such as repairing minor leaks and completely cleaning the radiator paths. Washing the car radiator is one of the most important actions for Car care in the cold is considered
Radiator stop leak supplement K2 Model Radiator Stop Leak (400ml)
This Polish product is one of the most professional leak stoppers on the market. Its advanced formula with polymer compounds seals the microscopic seams of the radiator without blocking the path.
benefits
- Avoid minor leaks
- Compatible with all types of coolant
- Can be used without opening the system
Disadvantages
- Not designed for complete flushing of the system
- It is less effective in large spills

605,000
475,940 Toman
Istab model G car radiator leak stopper (200ml)
An economical product from Istab brand, which is designed with an anti-rust and anti-fog formula. This leak stopper works well for Iranian and foreign cars with normal engine volume.
benefits
- Reasonable price and available
- Can be used for all types of antifreeze
- Prevent rust
Disadvantages
- Suitable for minor leaks only
- Need to periodically repeat consumption

120,000 Toman
Dirgon radiator washing solution model DG-15 (354ml)
This Iranian solution with a mild alkaline formula cleans deposits and rust from the internal ducts of the radiator and engine block, without damaging aluminum or plastic.
benefits
- High and fast cleaning
- Safe for different materials
- Increasing the efficiency of the cooling system
Disadvantages
- Need to empty completely after use
- Improper use may cause excessive foaming

How to use radiator cleaning agents
- Draining the old liquid: First, cool the engine and drain the antifreeze or old liquid from the bottom valve of the radiator.
- Add washing solution: Pour the recommended amount of detergent into the radiator tank and mix with distilled water.
- Start the engine: keep the engine running for 10 to 15 minutes to circulate the solution in the circuit.
- Final drain and backwash with distilled water: After cooling, completely drain the system and fill with fresh antifreeze.
- The right time for washing: every 24 to 30 thousand kilometers or once a year.
- Safety Tip: Always make sure the engine is cool when opening the radiator cap.
Important points when buying radiator cleaner
- Consider the type of car and the size of the engine and radiator. For more information on this to the article Radiator buying guide refer to
- Use reputable and licensed brands.
- User comments on Digikala can be a good guide for choosing.
- Avoid mixing several types of detergents or spills at the same time.
summary
If you want to clean your car’s radiator or prevent minor leaks, the combination of the two recommended products is the best option: for thorough cleaning and removing deposits, choose DG-15 long-lasting solution. For minor leak repair and ongoing protection, K2 Radiator Stop Leak Supplement works great. As a result, these two products together can make your car’s cooling system as efficient as the first day.
Source: Digikala Mag
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