Rubber, Fluorosilicone Elastomer, Oil -, Hydraulic Fluid-, and Fuel-Resistant, Sheets, Strips, Molded Parts, and Extruded Shapes

MIL-DTL-25988 covers fluorosilicone (FVMQ) rubber parts intended for aerospace and aeronautical applications. Specifically, MIL-DTL-25988 covers: MIL-DTL-25988 divides these into two types, each with several sub-classes.

Validation testing for MIL-DTL-25988 FVMQ rubbers includes hardness, tensile strength, elongation, compression set, tear strength, specific gravity, elongation, and temperature retraction, along with pre-test conditioning. Specific aging tests include engine oil and fuel aging.

How Smithers Supports MIL-DTL-25988

Smithers supports defense manufacturers and suppliers through independent testing and technical assessment for fluorosilicone (FVMQ) elastomer materials used in demanding aerospace and defense applications. Our specialists help evaluate material performance, fluid compatibility, environmental durability, and long-term reliability to support qualification activities and generate trusted technical evidence for defense applications. 

Explore our Defense Materials and Qualification capabilities to learn more.

MIL-DTL-25988 rubber parts are not compatible with synthetic phosphate ester-based hydraulic fluids and are generally not recommended for gas turbine or helicopter transmission lubricants. 

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