Delo XLI Corrosion Inhibitor – Concentrate

Premium performance extended life corrosion inhibitor

Delo ® XLI Corrosion Inhibitor - Concentrate is a premium performance extended life corrosion inhibitor. Delo XLI Corrosion Inhibitor - Concentrate is formulated with patented advanced carboxylate additive technology, designed to offer long-life, low maintenance corrosion protection.

Delo XLI Corrosion Inhibitor - Concentrate has been extensively field tested and the synergistic combination of mono- and di-carboxylic additives has been proven to promote effective protection for over 8000 hours or 650,000 km in off-road, truck and bus applications, and 32,000 hours in marine and stationary engines. The product is compatible with a range of glycol-based engine coolants.

Benefits

• Advanced synergistic additive technologies offer extended, low maintenance corrosion protection, helping increase uptime
• Promotes high performance protection in thermostats, radiators, water pumps and other vulnerable cooling system components
• Offers reliable protection to a wide range of metals including aluminium, iron, copper and solder alloys
• Aids performance and cooling system protection in modern high temperature aluminium engine environments
• Reliable, high technology non-depleting inhibitors aid consistent long-life performance and protection
• Silicate and phosphate-free technology offers reliable, stable dilution in harder waters

Applications

• Mixed with the appropriate amount of water, Delo XLI Corrosion Inhibitor - Concentrate is recommended as a coolant, flushing fluid or hot test fluid for engine blocks and cooling systems. During extensive field testing, the synergistic combination of mono- and di-carboxylic additives has proven to offer protection for at least 32,000 hours in marine and stationary applications
• Delo XLI Corrosion Inhibitor - Concentrate promotes long-life protection against corrosion through the use of optimised and patented organic corrosion inhibitors. Delo XLI Corrosion Inhibitor - Concentrate offers longlife protection to aluminium heat transfer surfaces contained in modern engines. The inhibitor package of Delo XLI Corrosion Inhibitor – Concentrate aids cavitation protection without the need for nitrite additives, either within the product itself or by the addition of nitrite-based supplemental coolant additives (SCA’s)
• Delo XLI Corrosion Inhibitor - Concentrate promotes long-life corrosion protection. Depending on the actual application the dosage may vary from 5 - 10 vol%, but a minimum of 5 vol% of Delo XLI Corrosion Inhibitor Concentrate in water should be used. Delo XLI Corrosion Inhibitor - Concentrate may be used in engines manufactured from cast iron, aluminium or combinations of the two metals, and in cooling systems made from aluminium or copper alloys. The dosage of Delo XLI Corrosion Inhibitor - Concentrate may be checked with a refractometer
• Delo XLI Corrosion Inhibitor - Concentrate is recommended for hi-tech engines such as racing cars and heavy-duty off-road equipment, where high temperature aluminium protection is important
• In marine applications, the concentration of Delo XLI Corrosion Inhibitor - Concentrate should not be lower than 5 vol%. At this dosage the recommended life-time is at least 32,000 hours. If Delo XLI Corrosion Inhibitor - Concentrate is replenished regularly to compensate for leakage, the cooling water can be considered as fill for life
• For off-road, truck and bus applications the recommended lifetime is 8000 hours or 650,000 km, provided that a concentration of 7.5 vol% Delo XLI Corrosion Inhibitor - Concentrate is used
• At 7.5 vol%, Delo XLI Corrosion Inhibitor - Concentrate will provide corrosion protection in stationary engines for at least 32,000 hours
• Delo XLI Corrosion Inhibitor - Concentrate can also be used at 10 vol% as a hot test liquid for new engine blocks. Newly manufactured engines are tested for a duration of approximately 5 to 10 minutes, after which the fluid is drained and usually reused. If the engine blocks are not immediately built into vehicles, Delo XLI

Specifications

• Jenbacher
• MAN Energy Solutions
• MAN Truck & Bus
• MaK
• MWM
• MTU
• Wartsila

Approvals

• Jenbacher TA 1000-0200
• MAN Energy Solutions MAN 175D engines MAN 4-stroke medium speed engines MAN 28/33D engine
• MWM TR 0199-99-2091
• MTU 2000 and 4000 series engines (cooling systems free of light metal) 2000 4000-1 4000-2 4000-3 4000-5 Construction x x x x — & Industrial Oil & Gas x — x x — Genset — x x x x Marine — — — x x Rail R41 and R43
• Delo XLI Corrosion Inhibitor - Concentrate meets the requirements of:
• MAN B&W (MAN Energy Solutions) D36 5600
• MAN Truck & Bus: MAN 248
• MaK
• Wärtsilä 32-9011

Typical test data

Source: PDS 26 March 2025 · Product Data Sheet

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