Houghto-Safe 1115

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Phosphate ester type fire resistant hydraulic fluid




Houghto-Safe 1115 is a phosphate ester fluid that is approved for operation in all types of pumps and associated hydraulic components. Houghto-Safe 1115 combines fire resistance with excellent lubricating properties. Houghto-Safe 1115 is Factory Mutual approved. Houghto-Safe 1115 is made from triaryl phosphate ester plus corrosion and oxidation inhibitors. These inhibitors extend the fluid service and insure maximum hydraulic circuit component life with lower maintenance costs.


Houghto-Safe 1115 can be used at elevated temperatures up to 150°F, but for optimum fluid life we recommend a reservoir temperature of 120°F. Many years of field experience confirm that Houghto-Safe 1115 excels in fire resistance, component lubrication, thermal stability, and corrosion prevention.


Houghto-Safe 1115 is compatible with all metals common to hydraulic power circuits that include all steel, cast iron, copper, bronze, brass, zinc, cadmium,





Clear green mobile fluid

Viscosity@ 25°F, SUS / cSt

@ 100°F, SUS / cSt

@210°F, SUS / cSt

4000 / 866

150 / 32.0

42 / 4.8

ISO Grade


Total Acid Number (mg KOHig)

0.2 maximum

Specific Gravity @ 60/60°F


Pounds per Gallon


Pour Point, °F


Flash Point, °F


Fire Point, °F


Auto-Ignition Point, °F


Rust Test ASTM D-665A





aluminum and magnesium metals. Houghto-Safe 1115 is compatible with the following elastomers butyl, ethylene propylene, viton, silicon and chlorinated polyethylene.


Houghto-Safe 1115 is not compatible with water containing fluids such as water glycols, water in oil emulsion and high water content fluids. All standard filtration techniques are satisfactory with Houghto-Safe 1115. Blotter type filter elements will remove water contamination. Activated earth or alumina can be used to reclaim degraded or contaminated fluid.




Factory Mutual Approved as a fire resistant hydraulic fluid that protects personnel and property from accidental fire and may lower insurance premiums

Fluid has an inherently low Total Acid Number that resists oxidation

Contains additives to enhance oxidation stability that will extend service life

Provides excellent lubrication characteristics which extends pump and component life

Hydrolytically stable to resist degradation when water contamination is present

Composed of triaryl phosphate ester with inhibitors to extend fluid service and insure the maximum hydraulic circuit component life with lower maintenance costs




Refer to MSDS for proper handling and disposal. Please note that the MSDS includes handling, health and disposal information which should be passed on to your employees, and to anyone else who comes in contact with our product. Additional advice can also be obtained from your local Houghton representative.


NOTE: Read and understand all precautions on container labels before using this product.

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