Delo® XLI Corrosion Inhibitor

Heavy Duty Coolant

Delo® XLI Corrosion Inhibitor

Delo® XLI Corrosion Inhibitor is a water based, low toxicity, environmentally friendly, nitrite free carboxylate inhibitor (OAT technology).

*Our Product Data Sheets (PDS) contain product information including features, benefits, applications, typical key properties and service considerations. PDSs are produced regionally based on the best available information at the time of issue. For each product, there is one PDS for the Asia Pacific region. The specific information included in each PDS may not directly reflect the Australian market or Australian conditions. In the event of any inconsistency between this webpage and the applicable PDS, this webpage prevails. For the most up-to-date, Australian-specific information contact us. Please note that, by clicking the PDS link, you will be leaving the Caltex Australia website.

*Disclaimer: The actual product may vary from the images shown on this website*

  • Corrosion Protection
Provides superior corrosion and cavitation protection for engine metals, including aluminum, iron, copper and solder alloys. The OAT technology provides ASTM D3306 and ASTM D6210 performance when used in glycol based antifreeze coolants.
  • Wide Service Application

Recommended as a coolant for all types of cooling
systems where freeze protection is not required. 

  • Long service life  

The corrosion inhibitors in Delo® XLI Corrosion Inhibitor contain a synergistic combination of mono and di-carboxylates that provide superior protection for a minimum of 960,000 kilometers, 12,000 hours, 6 years in on-road and off-road engine applications and 32,000 hours or 6 years in stationary engines. This product does not require regular inhibitor additions if proper maintenance practices are used. 

  • Compatibility

Delo® XLI Corrosion Inhibitor - Concentrate is a super concentrate and should be diluted to 5.5%-10% with good quality water before use. Compatible with glycol-based engine coolants but further dilution of the Delo® XLI inhibitors by more than 25% with other corrosion inhibitor technologies will reduce the effectiveness of these products.

  • Heat Transfer

Silicate and phosphate free formulation does not contribute to deposit build up, as can be seen with phosphate and silicate containing coolants, which can help maintain heat transfer efficiency.

  • Low Maintenance 

Requires very low maintenance compared with conventional products which require SCA.

  • Improved economics 

No regular inhibitor additions and longer service life means lower overall maintenance costs. 

  • Excellent toxicological and environmental aspects

Based on low toxicity inhibitors these products are readily biodegradable. The extended service life characteristic of this product contributes to the protection of the environment due to less frequent fluid disposal.

  • Easy Testing

Inhibitor concentration testing can be easily done using a brix refractometer.

Delo® XLI Corrosion Inhibitor provides long life corrosion protection by using optimized and patented aliphatic carboxylate organic inhibitors that provide long lasting protection for cooling system metals and components including hard to protect aluminum.
Delo® XLI Corrosion Inhibitor helps maintain excellent heat transfer since it does not contain silicates and phosphates which can over time create deposits on heat transfer surfaces.

Delo® XLI Corrosion Inhibitor exhibits low depletion rates and does not require the addition of supplemental coolant additives with correct maintenance practices. Dilution of Delo XLI Corrosion Inhibitor by more than 25% will reduce inhibitor performance.
Delo® XLI Corrosion Inhibitor protects against erosion, corrosion and cavitation of cooling system components. 

Delo® XLI Corrosion Inhibitor is approved for use by the following OEMs:

• GEC Alsthom Ruston
• Liebherr MD 1-36-130 (DCA)
• MaK
• MB 312.0
• MTU MTL 5049
• Newman-Haas Racing
• Wärtsilä 32-9011
• Yanmar

Delo® XLI Corrosion Inhibitor is also recommended for the following OEMs: 

• Caterpillar
• Detroit Diesel
• Deutz (TR0199-99-2091)
• Komatsu
• Liebherr MD 1-36-130 (DCA)
• MAN 248
• MAN Diesel (2-stroke and 4-stroke engines)
• Scania TI 2-98 0813 TB
• Sulzer Diesel ZBS0503
• Ulstein Bergen
• Volvo
• Wärtsilä 32-9011

Delo® XLI Corrosion Inhibitor is also recommended for use in any OEM equipment
recommending a nitrite free, water based carboxylate based corrosion inhibitor, or
where heavy duty mixed OEM fleets require a single coolant/inhibitor for ease of
handling on site.

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