Exceptional Products & Service Since 1985

RMI-25 Treatment Procedures

The recommended time interval for adding RMI-25 to the cooling system is 300 hours or 15,000 miles/yearly, whichever comes first. At that time, either retreat at the recommended ratio of 8 oz. per 5 gallons of coolant or perform the recommended tests explained below.

Freezing Protection Test

Check for the freezing protection of the Ethylene Glycol in the coolant system with a Hydrometer. Since RMI-25 does not contain any harmful solids, such as silicates, nitrates, borates or molybdates, standard test materials are not applicable (i.e., nitrite strips).

pH Test

Check the pH level of the cooling system to determine the acid or alkaline levels present. Dip a standard Hot Tub type test strip (also tests for Alkalinity) or a standard full range litmus paper (pH only) into the coolant. Immediately compare the color of the paper to the color chart provided with the litmus paper. A healthy cooling system will have a pH level of 8.5 to 10. If the color chart indicates a pH level below 8, retreat with the recommended dose of RMI-25. When the pH level of a cooling system drops into the acid range (below 7) electrolysis can occur. A system that becomes prematurely acidic may have exhaust gases leaking into the system.

Hot Tub type test strips or litmus paper are available at pool, chemical, laboratory, or carpet cleaning supply stores. Note: the accuracy of test strips declines rapidly with age usually after about six months.

The pH testing alone will typically tell you what you need to know, but as a double checking method, separate checking for Alkalinity may be preferred. If combined pH/Alkaline test strips are not used, the procedure shown next is recommended.

Voltage/Ohm Meter Test

Check the voltage level of the cooling system if combined pH/Alkaline test strips are not available. To do so, use the lowest DC voltage scale on a voltmeter to perform the test. Drop the negative lead into the coolant and ground the positive lead. The surge at the moment of grounding is the proper reading to observe, as the current will quickly drain off reducing your voltage reading. Keep in mind that with this method, the reading on a hot engine will be 4-5 times greater than that of a cold engine. The reading on a cold engine should be multiplied by a factor of 4. If this value approaches .5 volts or 5/10ths, retreat with the recommended dose of RMI-25.

Proper Cooling System Maintenance

Without proper maintenance, RMI-25 will be inefficient in prolonging engine and cooling system life. The following key factors when maintained will allow RMI-25 to do its work and in return, RMI-25 will help increase and protect these elements from early failure.

Radiator Cap

In addition to keeping air out of the system, the cap actually does more for anti-boil than a 50/50 mix of antifreeze. Every 1 lb. of pressure raises the boiling point of the coolant by 3 degrees. So when the radiator cap wears out and no longer provides the proper amount of pressure, the fluids running through the system will boil at a lower temperature. Therefore, increasing the heat in the system and lowering the efficiency of the cooling system in the engine.

Coolant Recovery Tank

An empty reservoir allows more air to be drawn into the cooling system. Air in the system is not a coolant and takes up space that could otherwise be used for coolant. More air obviously means more oxygen in the system, which allows rust, oxidation and cavitation erosion to thrive in the system. Aeration can speed up corrosion rates in cooling systems by 30x's. It may also cause coolant foaming and overheating, further endangering the system to fail.

Keeping the System Clean

A clean system is vital to the overall efficiency of the cooling system. A 1/16th inch layer of rust is capable of cutting an engine's ability to dissipate heat by as much as 40%. Also a 1/16th inch of rust can raise water temperatures from 200 degrees to as high as 700 degrees Fahrenheit. Many additives specifically state that they are designed to work on clean systems only. Keeping the system clean will go a long way in reducing many cooling system failures.

Coolant Sensor

Often these are referred to as the Master Sensor because of the many functions they regulate. Corrosion on the sensor or low level electrical charges in the coolant itself can send improper readings to the computer, causing a variety of problems.

Hoses & Seals

A neglected cooling system will drastically reduce the life of these components. In addition to the damage caused by rust and scale, many of today's problems are caused by electrochemical corrosion, attacking the inside of the hoses and the surface of the seals.

In conclusion, proper maintenance and the use of RMI-25, is an efficient and cost-saving method for prolonging cooling system and engine life.