Specialty Silicone Products (SSP) supplies MIL-DTL-25988 fluorosilicone elastomers for defense and aerospace applications. These Made in the USA materials meet the requirements of MIL-DTL-25988, a detail specification from the U.S. Department of Defense (DoD) that covers oil-resistant and fuel-resistant rubber. SSP provides a certificate of analysis (COA) for each batch, supplies cured sheets and rolls in a range of thicknesses, and offers custom pre-form widths and thickness for uncured materials. Minimum order quantities (MOQ) as low as five pounds or five sheets are available for molding or die cutting.
MIL-DTL-25988 Definitions and SSP Products
MIL-DTL-25988 divides compliant fluorosilicones into Types, Classes, and Grades. Type 1 elastomers are for O-rings and Type 2 materials are for molded parts (other than compression seals) and include short sheets, strips, and extruded shapes. Class 1 fluorosilicones are for intended for general-purpose use and further divided into durometer-based grades. Class 2 fluorosilicones are for high-strength, general-purpose applications and have grades that also correspond to durometer designations. The table below describes SSP’s MIL-DTL-25988 fluorosilicone elastomers.
Fluorosilicones | MIL-DTL-25988 Callouts | ||
Product No. | Type | Class | Grade |
2 | 2 | 70 | |
2 | 1 | 60 | |
1 & 2 | 2 | 70 | |
2 | 1 | 40 | |
2 | 1 &2 | 50 | |
2 | 2 | 80 | |
*Also meets AMS-3326/3325
** Independently tested by ARDL, Inc.
COAs vs. COCs for MIL-DTL-25988 Fluorosilicones
Certificates of analysis (COAs) and certificates of conformance (COCs) are documents that attest to the quality of a supplier’s materials. COAs report the test results for a specific batch of materials while COCs simply indicate compliance with those requirements. When you buy MIL-DTL-25988 fluorosilicones from SSP, you’ll receive a COA with batch-level quality testing data. Other suppliers send standard COCs instead, but the document that you receive could be for a qualification test or formula that’s no longer current. When your source from SSP, however, you can see the test data about what you’re getting.
Cured and Uncured MIL-DTL-25988 Fluorosilicone Elastomers
SSP supplies sheets and rolls of cured MIL-DTL-25988 fluorosilicones at thicknesses from .015” (minimum) to .125” (maximum) and at custom thicknesses anywhere in-between. For uncured materials, SSP offers custom pre-form widths and thicknesses. If you’re a rubber molder, you can know it can be hard to get a slabbed product into a form that fits and flows in your mold. However, SSP can deliver a custom, uncured thickness so that you can cut precise pre-forms that are ready to drop right into your mold. This produces less waste and reduces rejections from no-fills or out-of-spec parts with a relatively expensive material.
Low Minimum Order Quantities (MOQs)
SSP can supply 5-lb. batches of MIL-DTL-25988 fluorosilicone elastomers so that you can conserve cash and avoid waste. Let’s say a customer needs two hundred small O-rings. That’s just a pound of material for molding. If you buy from a supplier with high MOQs, you may have to buy 50 lbs. of fluorosilicone. You could try to pass-on these costs, but you risk losing the job. If you inventory 49 lbs. of this relatively expensive elastomer, the product could expire before the customer re-orders. For die cutters who need just a few sheets, SSP can also provide what you need. Other suppliers may have MOQs of 10 yds. or more.
Ask SSP for Military and Aerospace Fluorosilicones
SSP supplies the Made in USA MIL-DTL-25988 fluorosilicone elastomers that you need in the quantities and thicknesses you require. Each batch comes with a COA, and you can find technical data sheets and material data sheets right on our website. To request a quote or get more information, contact SSP on-line or email Dominic Testo, Business Development Manager.
