Shieldoseal 3991 series creates a electrically and thermally conductive connection between components. Used for ESD and EMI shielding applications.
Shieldoseal is a 65-durometer adhesive sealant, filled with electrically conductive particles. The sealant will cure within 24 hours, but ultimate physical properties could take up to 72 hours to develop. Shieldoseal should adhere excellently to most substrates
One of the applications of Shieldoseal is EMI shielding. Shieldoseal has excellent filling properties, therefore almost any surface can be filled up. Shieldoseal cures quickly at room temperature. When fully cured, the substance remains as elastic as rubber and is homogenously conductive. In addition, it especially distinguishes itself from other substances by a high level of heat conductivity. Shieldoseal is pasty and can be used to glue metals (copper, aluminium, stainless steel, brass, etc.), ceramics and most plastics. Properties for individual applications are listed in the table below.
|Specification||Part number 3991|
|Conductive particles||Nickel graphite|
|Tensile Strength||250 psi|
|Shelf life||Six months from date of manufacture|
|Handling/Safety||MSDS information is available on request|
|Metal with metal||Good|
|Metal with RFI gasket||Good|
|RFI gasket with RFI gasket||Good|
|Viscosity upon delivery||Viscous|
|Catalyst||21 °C||Air humidity|
|Resistance against||UV, ozone||Yes|
|Storage time: plastic cartridges||Weeks||2|
|Storage time: aluminium||Weeks||8|
|Curring at room temperature||21 °C||Yes|
|Film formation at 0,2 mm strength approx.||Minutes||1 - 4|
|Curing at 0,2 mm strength approx||Minutes||5 - 20|
|Curing based on film strength and venting surface approx.||Minutes||3 - 180|
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