Specification Grade Materials for the Defense Industry – Custom Gaskets, Seals, Pads and More

Certain industries require specification grade materials for applications that are proven to withstand certain environmental extremes. The military and defense industry require the use of elastomeric materials to be certified Mil-Spec for various properties including; physical, electrical and thermal, temperature resistance, flammability and outgassing, and environmental. Standardization is beneficial in ensuring products meet certain requirements, commonality, reliability, and compatibility. SRP commonly converts many of these materials at our manufacturing facility here in the United States. These materials include; rubber, sponge, foam, plastic, film and insulation paper.

Mil-Spec Sheet Rubber Materials

The following sheet rubber materials are the most common for military and defense applications:

  • Neoprene (MIL–R–3065 SC / MIL-R-6855 Class 2 / MIL–G–1149 / ASTM D2000 M2BC)
  • EPDM (MIL–R–21252 / MIL–R–83285 / MIL–R–900 / ASTM D2000 M4AA)
  • Nitrile (Buna-N) (MIL–R–3065 SB / MIL-R-6855 Class 1 / MIL–G–1149 / MIL–R–2765 / ASTM D2000 M5BG)
  • SBR (MIL–G–1149)
  • Viton® (MIL-R-83248C Type II Class 1)
  • NORSEAL® (ZZR-765 / A-A-59588)

Mil-Spec 3M™ Adhesive Tapes

The following 3M™ Adhesive tapes meet Mil-P-19834B specification:

  • 966 (100 – High Temperature Acrylic)
  • F9460PC (100MP – High Performance Acrylic)
  • F9469PC (100MP – High Performance Acrylic)
  • F9473PC (100MP – High Performance Acrylic)
  • 467MP (200MP – High Performance Acrylic)
  • 468MP (200MP – High Performance Acrylic)
  • 9668MP (200MP – High Performance Acrylic)
  • 9471 (300 – High Strength Acrylic)
  • 9472 (300 – High Strength Acrylic)
  • 9671 (300 – High Strength Acrylic)
  • 9673 (300 – High Strength Acrylic)
  • 9739 (Specialty Acrylic)
  • 9380 (Specialty Acrylic)

Mil-Spec Polyurethane Foam

The following polyurethane foam materials meet Mil-P-12420 D specification:

  • PORON® 4701-30
  • PORON® 4701-40
  • PORON® 4701-41
  • PORON® 4701-50
  • PORON® 4701-60
  • PORON® 4790-92

Mil-Spec Sponge Rubber

The following sponge rubber materials meet MIL-R-6130C / MIL-C-3133C / MIL STD 670 B specifications:

EPDM Blend




SRP has the capabilities to custom fabricate a variety of gaskets and seals for the military and defense industry. Our goal is to always ensure that our product meets each and every quality standard from our customers. Our CAGE code is 60841, and we are enrolled in the Simplified Acquisition Program of US Federal Contractor Registration. Visit our web page at