Specification Grade Silicones

MIL-SPEC Silicone Sheets & Uncured Compound

MIL-SPEC silicone (Mil silicone) from ElastaPro is supplied as sheet materials or uncured compound and meets U.S. military specifications and standards. MIL-SPEC, short for “military specification”, refers to a set if requirements established by the U.S. Department of Defense (DoD) for the design, performance, and quality of products used by the military. These specifications ensure that that items such as rubber seals and gaskets are durable, reliable, and can interoperate with other military equipment and systems, such as for fuel delivery.

Need MIL-SPEC  Silicone Sheeting or Slit Rolls?

We supply continuous roll stock, pre-cut solid sheets, and custom uncured compounds with low minimum order quantities, optional pressure-sensitive adhesives (PSA), and rapid turnarounds.

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MIL-SPEC Silicone vs. Military Grade Silicone

A silicone is considered MIL-SPEC only if it is manufactured to the defined standards and passes all required testing. These specifications include criteria for material, dimensions, and performance under stress. Sometimes, a MIL-SPEC silicone is referred to as a Mil silicone.

Available Mil Silicone Materials

ElastaPro makes MIL-SPEC silicone and fluorosilicone materials that meet the following military specifications and standards.

Silicone sheets arrive ready for die cutting and are available with pressure-sensitive adhesives (PSAs). ElastaPro makes both solid silicone sheet and cellular silicone sheet. Uncured silicone compound arrives ready for curing and can be molded, extruded, or calendered.

Note that MIL-SPEC silicones also include materials that meet related specifications and standards. For example, some aerospace silicones and SAE International silicones have military applications because of their excellent material properties. Examples include AMS silicones and AMSR25988 fluorosilicones. ElastaPro makes these and other spec-grade rubber materials.

Frequently Asked Questions about MIL-SPEC Silicones

What is the difference between MIL-SPEC silicone and standard military-grade silicone?

A material is only classified as “MIL-SPEC” (Military Specification) if it is manufactured to precise U.S. Department of Defense (DoD) standards and successfully passes all required testing protocols. These specifications define strict criteria for materials, dimensions, and performance under stress to ensure that seals, gaskets, and other rubber components are durable, reliable, and capable of interoperating within critical military systems.

Which U.S. military specifications does ElastaPro’s silicone meet?

ElastaPro produces silicone and fluorosilicone materials formulated to meet a wide range of established military standards, including:

  • MIL-DTL-25988 (AMS-R-25988)

  • MIL-R-25988

  • MIL-R-46089

  • MIL-R-6130

  • MIL-STD-417 TA

  • MIL-STD-670 TE12

  • WS14644

In what forms can I purchase ElastaPro’s MIL-SPEC silicone?

To support various manufacturing and defense application needs, ElastaPro offers MIL-SPEC silicone in several formats:

  • Solid and Cellular Sheeting: Ready for die-cutting and available with optional pressure-sensitive adhesives (PSAs).

  • Uncured Compounds: Supplied ready for customer-side curing processes, including molding, extrusion, or calendering.