Material Specifications & Compatibility

Spira’s EMI/RFI products are made using the finest materials and processes in compliance with AS9100 and ISO 9001. Material certifications are available upon request when your order is placed. Materials used are typically purchased to the following specifications unless otherwise noted or requested. See the Material Compatibility Chart.

View Material Specifications and Compatibility datasheet in pdf format for easy printing.

MaterialComponent/ProcessSpecificationStorage TempOperating Temperature
SpiralBeryllium CopperASTM-B-194Ambient-73° to 232° C, -100 to 450° F
Stainless SteelAMS-5906Ambient< 704° C, < 1300° F

PlatingChemical FilmMIL-DTL-5541 Class 3Ambient< 66° C,  < 150° F
Chemical Film (RoHS)MIL-DTL-5541 Class 3, Color ClearAmbient< 66° C, < 150° F
GoldMIL-DTL-45204, Type II, Grade C, Class 1Ambient< 274° C, < 525° F
Pure Tin (RoHS)ASTM-B-545Ambient< 150° C, < 302° F
Tin-Lead90% Tin, 10% Lead per AMS-P-81728 Ambient< 150° C, < 302° F
Sulfamate NickelAMS-QQ-N-290B, Class 2Ambient< 649° C, < 1200° F

RubberEPDM (Solid)ASTM D2000 M3 BAAmbient-80° to 275° C,
-112° to 527° F
Fluorosilicone (Solid)MIL-DTL-25988, Type ll, Class 1Ambient-55° to 225° C,
-67° to 437° F
Fluorosilicone (Sponge)AMS-3323Ambient-62° to 204° C,
-80° to 400° F
Neoprene (Sponge)ASTM-D-6576, Type II, Grade A, Condition-MediumAmbient-54° to 121° C,
-65° to 250° F
PVC CordCommercial GradeAmbient-30° to 160° C,
-22° to 320° F
Silicone (Solid)A-A-59588, Class 2B.
See product spec sheet for grade.
Ambient-65° to 225° C,
-85° to 437° F
Silicone (Sponge)Red per ASTM-D-6576, Type II, Grade C, Condition-MediumAmbient-38° to 204° C,
-100° to 400° F
Thermal Plastic RubberASTM-D-2000 CA710, C32, EA14, F19Ambient-80° to 275° C,
-112° to 527° F

AdhesiveEpoxy2216 B/A per ASTM-D-2000Ambient-80° to 275° C,
-112° to 527° F
(Enduro-Shield core)
Dow Corning 730 RTV≤ 32° C-57° to 260° C,
-71° to 500° F
Fluorosilicone (Red)Dow Corning Q4-2817 Sealant≤ 32° C-57° to 260° C,
-71° to 500° F
Neoprene (Contact Cement)MMM-A-1617, TYPE II-16° to 27° C-67° to 177° C,
-89° to 351° F
PSA (Neoprene)Rubber/Acrylic adhesiveAmbient-34° to 65° C,
-30° to 150° F
PSA (Silicone & Fluorosilicone)Acrylic Adhesive24° C-40° to 121° C,
-40° to 250° F
Silicone (Enduro-Shield standard core)Dow Corning 732 RTV Per MIL-A-46106, Group I, Type I≤ 32° C-60° to 177° C,
-76° to 351° F
Silicone (Enduro-Shield Stainless Steel gaskets)Dow Corning 737≤ 32° C-65° to 177° C,
-85° to 351° F
Silicone (Non-acetic acid base)Dow Corning 3145 RTV Per MIL-A-46146, Group II, Type I≤ 32° C-50° to 200° C,
-58° to 392° F
Silicone (White, non-outgassing)Dow Corning 61125 Per ASTM E595≤ 32° C-60° to 177° C,
-76° to 351° F

Other Connector-Seal
Metal Frame/Core
6061-T6 Aluminum per AMS-4027 (SSCG)Ambient< 343° C, < 650° F
Stainless Steel per AMS-5516M (Core)Ambient< 704° C, < 1300° F
Dovetail Groove CutterTungsten CarbideAmbientN/A
AirVent Filter Extrusion6061-T4 Aluminum per AMS-QQ-A-200/8Ambient< 343° C, < 650° F
Fan Filter Frame6061-T4 Aluminum per AMS-4026Ambient< 343° C, < 650° F
Honeycomb PanelAluminum per AMS-C-7438Ambient< 204° C, < 400° F
Brass per ASTM-B-36/B 36M. Foil soldered together per ASTM-B-32Ambient< 230° C, < 446° F
Threaded InsertCadmium plated Alum. AMS-QQ-P-416AmbientN/A

The shielding effectiveness of EMI gasketed joints can be significantly affected by corrosion. The corrosion of concern is a galvanic cell between the gasket and the joint surface in the presence of moisture or salt-fog atmospheres. The chart below lists six common materials used in EMI gaskets along with their degree of compatibility with common joint surface material/plating combinations. (The chart was extracted from ARP-1481, published by the Society of Automotive Engineers). The legend describes the degree of compatibility and/or requirements for obtaining a corrosion free joint. The term “requires sealing” means that the gasketed joint surfaces must be protected in some way from the moisture and/or salt-fog atmospheres.

Joint Surfaces table e1546636117715

*Standard gasket materials used by Spira.


A - Compatible
B - Requires sealing only if exposed to salt atmosphere or high humidity. Edge plating may be satisfactory
C - Requires sealing if exposed to humid environment
D - Compatible in environment of controlled temperature and humidity only
E - Requires sealing regardless of exposure
X - Not usable

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