RMI 25 | Cooling System Treatment
RMI-25 is a professional-grade cooling system additive that cleans, protects, and conditions your entire cooling system. It eliminates rust, scale, and sediment while lubricating seals, valves, and hoses — and even includes a fluorescent leak detector to help you find hidden leaks fast.
PROFESSIONAL COOLING SYSTEM PROTECTION IN A BOTTLE
Your Cooling System Works Hard — Are You Protecting It?
Rust, mineral scale, and sediment are the silent killers of cooling systems. Over time they clog radiators, damage water pumps, corrode hoses and seals, and cause engines to run hot. Ignoring cooling system maintenance leads to overheating, blown head gaskets, and engine damage.
Conventional coolants and flush products only go so far. They don't address the underlying deposits that reduce heat transfer efficiency and accelerate component wear.
RMI-25 advanced chemistry actively breaks down and removes rust, sediments, and mineral scale while conditioning the entire system from the inside out. It coats and protects metal surfaces, lubricates rubber seals, hoses, and valves, and helps your engine run at a lower, safer operating temperature.
Key Benefits:
- Eliminates rust, sediments, and mineral scale buildup
- Lubricates and protects water pump seals, heater valves, and hoses
- Contains fluorescent leak detector — find hidden leaks with a UV light
- Reduces engine operating temperature for safer, more efficient running
- Non-toxic and biodegradable — safe for you and the environment
- Protects agains rust build-up, corrosion and electrolysis
- Cleans the entire system
Can be used with distilled water, straight water or regular coolant
Dose rate
250mL of RMI25 treats 20L
In stock — NZ-wide delivery · simple returns · questions? Call us
How to use it
Honestly, this is the whole job:
- 1
Measure the dose
Use the dose rate on the label — the bottle cap is your measure.
- 2
Pour it in
Add it to your fuel or oil at fill-up or service. No workshop, no tools.
- 3
Drive as normal
The clean-up happens while you work. Most people notice a difference within two to three tanks.
Precautions — the straight talk
- Keep out of reach of children. Not for drinking — it's engine treatment, not cordial.
- Avoid skin and eye contact — wash with water if it happens. Gloves are a good idea when dosing.
- Store sealed, upright and away from heat or ignition sources — treat it like fuel.
- Stick to the dose rate on the label — more isn't better, it's just wasted product.
Safety Data Sheet (SDS)
The full safety and handling details, PDF format.
What it's done for others
Reviews from customers of Cost Effective Maintenance Australia — our parent company. Same products, 30+ years of results, now here in NZ.
"2006 Hilux, 285,000 km on the clock. Smoked on every hill. Two tanks and it's gone — and it's using less oil between services now."
"Run it across our five Rangers for 18 months. Cold shifts are smoother, the noisy diff went quiet, and the fuel cards show it on the long hauls."
"I tell customers most additives are snake oil. Ran it through a sludged-up Territory before its service — what came out in the drain pan told the whole story."
It pays for itself
A cleaner engine burns less fuel, uses less oil and puts off expensive repairs. One bottle costs less than an hour of workshop time — and you don't have to book anything.