Nickel graphite filled conductive shieldoseal 3991

Nickel graphite filled conductive shieldoseal 3991

Creates an electrically and thermally conductive connection between components. Used for ESD and EMI shielding applications.

Shieldoseal is a 65-durometer adhesive sealant that is made of a one-part, electrically conductive silicone-based adhesive with micron-sized nickel-coated graphite particles with excellent filling properties. Shieldoseal cures quickly at room temperature (RTV) in the presence of atmospheric moisture. It can cure on metals (copper, aluminum, stainless steel, brass, etc.), ceramics, and most plastics and can be used in environments from -50 up to + 175 °C without the loss of physical or electrical properties. The material remains as elastic as rubber and is homogeneously conductive.

Shieldoseal can be used to bond conductive elastomer gaskets field conductive gaskets, to attach shielding windows to edge frames, bond conductive elastomer gaskets, and for EMI and environmental protection as a sealant. Sieldoseal is a high-performance non-corrosive silicone material that meets the requirements of MIL-A-46146 and will form a cured skin within 60 minutes without the formation of corrosive byproducts of exposure to atmospheric moisture. Shieldoseal is a thixotropic paste that can be published on vertical surfaces without prolapsing.

Color Dark grey
Elastomer adhesive Silicone
Filler material Nickel coated graphite
Specific gravity 2.010
Hardness (Shore A) 65
Tensile strength (PSI) Min. 500
Elongation (%) Min. 100
Peel strength (PPI) Min. 4.0
Lap shear (PSI) Min. 130
Lower operating temperature °C Min. -50 °C
Higher operating temperature °C Max. +175 °C
Compression deflection (%) Min. 2.5
Volume resistivity, Ohm/cm Max. .100
Shelf life Six months from date of manufacture
shieldoseal can be delivered with sealing gun or pneumatic gun

Can be ordered separately:  a manual gun (part number 3991-M) or a pneumatic gun (part number 3991-P)

Conductive adhesive

Specification Unit 3991
Metal with metal   Good
Metal with RFI gasket   Good
RFI gasket with RFI gasket   Good
Viscosity upon delivery   Viscous
Toluene solvent N/cm 5
Catalyst 21 °C Air humidity
Resistance against UV, ozone Yes
Storage time: plastic cartridges Weeks 2
Storage time: aluminum Weeks 8


Specification Unit 3991
Curring at room temperature 21 °C Yes
Tack free Minutes 60
Light handling Hrs.  12 - 24
Full cure Hrs. 96 - 144
Odorless   No

Partnumber Description
3991 Shieldoseal 130 g plastic cartridge
3991-M Shieldoseal manual gun
3991-P Shieldoseal pneumatic gun


For this product, there are no free samples available


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Select an option:
3991 : Shieldoseal 130 g plastic cartridge
3991-M : Shieldoseal manual gun
3991-P : Shieldoseal pneumatic gun
* Note: The red blocks are required