Cooltech RTU OAT Long Life Coolant
From $59.00 incl. GST
Cooltech RTU OAT Long Life Coolant is a premium ready-to-use anti-freeze and anti-boil coolant designed for automotive and heavy-duty diesel engines.
- Pre-mixed – No dilution required
- Long life Organic Additive Technology (OAT)
- Protection against corrosion & cavitation
- Suitable for aluminium & mixed-metal systems
- Available in 5L & 20L
- Description
- Instructions
- Compatability
- SDS Sheet
- ASTM Testing
Description
Cooltech RTU OAT Long Life Coolant – Ready To Use
Cooltech RTU (Ready To Use) is a premium heavy-duty Organic Additive Technology (OAT) coolant formulated to provide long-lasting protection for modern automotive and diesel cooling systems.
Pre-mixed for convenience, Cooltech RTU eliminates dilution errors and delivers consistent anti-freeze and anti-boil performance in passenger vehicles, commercial fleets and industrial engines.
Key Benefits
- Ready to use – no mixing required
- Long life OAT corrosion protection
- Helps prevent cavitation and liner pitting
- Protects aluminium, steel, cast iron and mixed metal systems
- Silicate free formulation for improved water pump life
- Helps reduce scale, sludge and deposit formation
Applications
- Petrol (gasoline) engines
- Diesel engines
- Light commercial vehicles
- Heavy-duty trucks and transport fleets
- Mining and industrial equipment
Usage Instructions
- Ensure engine is cool before servicing.
- Drain radiator and engine block completely.
- Flush system if switching coolant types.
- Refill directly with Cooltech RTU.
- Run engine to operating temperature and recheck level.
Important
- Do not mix with conventional or hybrid coolant types.
- Always follow vehicle manufacturer recommendations.
- Contains ethylene glycol – harmful if swallowed.
Available Sizes
- 5 Litre
- 20 Litre
How To Use – Cooltech RTU OAT Long Life Coolant
Step 1 – Allow Engine to Cool
- Ensure engine is completely cool before opening the radiator cap.
- Never open a hot cooling system.
Step 2 – Drain Cooling System
- Drain radiator and engine block completely.
- Drain overflow reservoir.
- If switching coolant types, flush system with clean water.
Step 3 – Refill
- Pour Cooltech RTU directly into radiator.
- No dilution required.
- Fill overflow reservoir to correct level.
Step 4 – Run & Check
- Start engine and allow it to reach operating temperature.
- Turn heater on to circulate coolant.
- After cooling, recheck coolant level and top up if required.
Important
- Do not mix with conventional or hybrid coolant types.
- Always follow vehicle manufacturer recommendations.
- Contains ethylene glycol – harmful if swallowed.
- Keep out of reach of children.
Product Compatibility – Cooltech OAT Long Life Coolant Concentrate
Engine Compatibility
- Petrol (Gasoline) engines
- Diesel engines
- Light commercial vehicles
- Heavy-duty trucks & transport fleets
- Mining & industrial equipment
- Stationary diesel engines
Material Compatibility
- Aluminium engines and cylinder heads
- Cast iron engine blocks
- Mixed metal cooling systems
- Aluminium radiators
- Copper / Brass radiators
- Steel and solder components
Cooling System Compatibility
- Modern OAT coolant systems
- Heavy-duty diesel cooling systems
- High temperature operating environments
- Extended service interval applications
Standards & OEM Compatibility
Meets or exceeds major coolant specifications including:
- ASTM D3306
- ASTM D4985
- ASTM D6210
- AS/NZS 2108 Type A
- Caterpillar EC-1
- Cummins CES 14603
- GM 6277M
- Mercedes-Benz DBL 325
Important Compatibility Notes
- Do not mix with conventional, IAT or hybrid coolant types.
- Always flush system when changing coolant types.
- Follow vehicle manufacturer specifications.
ASTM Testing & Compliance – Cooltech OAT Long Life Coolant Concentrate
Cooltech OAT Long Life Coolant Concentrate has been tested and assessed under recognised ASTM corrosion, cavitation and performance standards. Testing confirms strong corrosion protection, aluminium heat transfer stability, and cavitation resistance under specified conditions.
ASTM Testing Completed
Cooltech has been tested under the following ASTM methods:
- ASTM D1384 – Corrosion Test for Engine Coolants in Glassware
- ASTM D4340 – Corrosion of Cast Aluminium Alloys Under Heat Rejecting Conditions
- ASTM D2570 – Simulated Service Corrosion Test for Engine Coolants
- ASTM D2809 – Cavitation Corrosion & Erosion Characteristics of Aluminium Pumps
- ASTM D3306 – Automotive Engine Coolant Specification (Light Duty)
- ASTM D4985 – Heavy Duty Engine Coolant Specification
- ASTM D6210 – Fully Formulated Heavy-Duty Coolant Specification
Corrosion & Performance Test Results
Testing performed at 50% (v/v) concentration in hard water.
ASTM D1384 – Glassware Corrosion
- Copper: 1 mg (Max allowable 10 mg)
- Solder: 2 mg (Within allowable limits)
- Brass: 1 mg
- Mild Steel: 1 mg
- Cast Iron: 1 mg
- Cast Aluminium: 2 mg
- No evidence of pitting observed
ASTM D4340 – Heat Transfer Aluminium Corrosion
- Heat Transfer Corrosion Rate: 0.3 mg/cm²/week (Max 1.0 allowable)
- No crevice or pitting attack observed
ASTM D2570 – Simulated Service Corrosion
- Copper: -0.3 mg
- Solder: -1.5 mg
- Brass: -0.4 mg
- Steel: 1.8 mg
- Cast Iron: -2.8 mg
- Cast Aluminium: -2.5 mg
ASTM D2809 – Cavitation Test
- Corrosion Rating: 9
- No cavitation damage evident
Compliance Summary
Cooltech meets or exceeds ASTM D3306, D4985 and D6210 performance specifications for automotive and heavy-duty engine coolant applications.
