Glacier Coolant LM-4AB Modified Diol Anti-Corrosion Coolant -30°C To 100°C

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✦ Glacier Coolant LM-4AB is a high-efficiency industrial coolant based on modified diol technology, designed for indirect cooling systems. It offers excellent anti-corrosion and anti-rust protection for carbon steel, stainless steel, copper, and aluminum across a wide temperature range from -30℃ to 100℃. With high specific heat, low toxicity, no odor, non-flammability, and low volatility, LM-4AB is ideal for use in chemical processing, pharmaceutical manufacturing, cold storage, and other industrial applications.

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Product Introduction

Glacier Coolant LM-4AB is a professional coolant developed for indirect cooling systems, where it transfers cooling capacity from the refrigerant to the substances being cooled. It is formulated with a modified diol solution and enhanced with a suite of additives, including corrosion inhibitors, mold inhibitors, solubilizers, and stabilizers. These components ensure outstanding physical and chemical stability across a broad operating temperature range.

LM-4AB demonstrates excellent compatibility with common metals such as carbon steel, stainless steel, copper, and aluminum, effectively extending equipment service life. Its high specific heat and strong cooling capacity enable efficient heat transfer even at lower flow rates, improving overall system energy efficiency. The product is practically non-toxic, non-flammable, and non-volatile, making it safer to handle, store, and transport.

The coolant is widely used in chemical reaction cooling, pharmaceutical production, cold storage, HVAC systems, and other industrial refrigeration applications. Its concentration can be adjusted according to operating requirements to optimize freezing point and thermal performance. Regular system checks and sample analysis are recommended to maintain long-term performance.

Leveraging Glacier Coolant’s 30 years of expertise in anti-rust and anti-corrosion solutions for industrial secondary refrigerants, the LM-4AB series delivers a safer, more efficient, and more reliable cooling solution for modern industrial systems.

Product Features

Concentration (wt %)	20	25	30	35	40	45	50	55	60
Relative density (g/cm³)	1.016	1.019	1.022	1.026	1.029	1.032	1.035	1.036	1.037
Freezing point (℃)	-7	-10	-13	-16	-21	-26.5	-33	-41	-50
Boiling point (℃)	101	101	102	103	104	105	106	106	107

The coolant treated by our company's proprietary Modify 2000 composite modification technology has the following characteristics:
◎ Strengthen specific heat and thermal conductivity, improve cooling capacity
◎ Reduce medium viscosity, save transportation energy consumption
◎ Inhibit liquid volatilization and reduce use consumption
◎ Sterilization, algae and scale inhibition to improve the system environment
◎ A variety of corrosion protection factors to prolong the service life of equipment
◎ Wide temperature range and good resistance to high and low temperature
Comparison table of freezing and boiling points at different concentrations:

Anticorrosion Mechanism

In view of the serious corrosion of equipment caused by ethylene glycol, alcohol and brine, the Glacier Coolant products adopt the “M3 super film corrosion protection” technology to form a super corrosion protection film through the synergistic action of three corrosion protection factors, which can effectively block the corrosion of a variety of metals and produce lasting protection for the cooling system. The principle of M3 super film corrosion protection is shown as follows:

Authoritative Test Conclusion

Glacier Coolant basically has no corrosion to carbon steel, stainless steel, red copper, aluminum alloy and other metals, and has good corrosion protection based on the test done by Institute of Metal Research, Chinese Academy of Sciences according to GB/T 19291-2003 《General principles of corrosion testing of metals and alloys》. The test results are as follows:

Non-Metallic Materials Compatibility

The compatibility between non-metallic materials and LM-4AB Glacier Coolant is shown in the following table:

	PVC	Fluororubber	Latex	HDPE	Natural rubber	PP	silica gel	PTFE
LM-4AB	√	√	√	√	√	√	√	√

Note: "√" means no dissolution, swelling, aging, etc. Please consult the manufacturer for materials not listed in the table.

The compatibility between non-metallic materials and LM-4AB Glacier Coolant is shown in the following table: PVC Fluororubber Latex HDPE Natural rubber PP silica gel PTFELM-4AB

√Note: "√" means no dissolution, swelling, aging, etc. Please consult the manufacturer for materials not listed in the table.

Product Selection

1. When selecting the product model and determining the concentration of Glacier Coolant, the temperature difference between the freezing point of Glacier Coolant and the lowest temperature of the system should be more than 10℃.

2. In order to ensure the flow rate and cooling effect of Glacier Coolant in the system, pipeline design and pump selection should be carried out according to the actual viscosity and density of Glacier Coolant at the operating temperature. In general, it is recommended to choose other product models with lower viscosity when the actual viscosity is higher than 80 cP.

3. The systems of Glacier Coolant shall be designed and installed in accordance with relevant standards and specifications.
Metal components: do not use incompatible equipment materials. Ensure the connections between different metals are insulated from each other to prevent corrosion of metal equipment caused by improper metal contact.
Non-metallic components: The test results indicate that LM-4AB is compatible with PVC, fluororubber, latex, HDPE, natural rubber, PP, polytetrafluoroethylene and silicone rubber. Please consult our company for other materials.

4. The system shall be leak detected and cleaned before the filling of Glacier Coolant. It is strictly forbidden to carry out welding and other fire operations when there is Glacier Coolant in the system.

Usage Method

1. After confirming that there is no leakage point in the system, clean the system and add Glacier Coolant solution to the system as soon as possible;
2. According to the operation temperature of the system, the addition amount of Glacier Coolant and water is calculated on the basis of the comparison table of concentration and freezing point;
3. Inject purified water or deionized water in succession. During the addition process, the circulating pump shall be turned on. After each addition of water, the solution concentration shall be tested after sufficient circulation to avoid excessive dilution caused by excessive addition of water. After the glacial coolant solution is prepared to the corresponding concentration, it can be used normally.
4. Glacier Coolant products are strictly forbidden to mix with other substances. Please contact our company in time in case of any special conditions.

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