LIMITLESS-SHIELDING-LIMITED-CA-NC-10

Conductive Silicone Adhesives  

Limitless Shieldings silicone conductive adhesives are single component, electrically conductive  

adhesives comprising of a silicone paste filled with electrically conductive particles. It is a room  

temperature vulcanizing (RTV) adhesive and sealing material that cures in the presence of  

atmospheric moisture.  

This adhesive is specially formulated with a high quality, non-toxic, non-corrosive silicone material  

that will form a cured skin within 60 minutes after exposure to atmospheric moisture without  

the formation of corrosive by-products. This material will remain flexible and conductive and can  

be used in environments where temperatures range from -55°C to 160°C without degradation of  

physical or electrical properties.  

The adhesive is in the form of a thixotropic paste that can be applied to vertical surfaces without  

sagging. It can be applied manually or as a form-in-place application to attach shielding windows to  

frames or bezels, bonding conductive elastomer gaskets, and for providing EMI and environmental  

protection as a sealant.  

Applications  

Vibration and/or shock resistant sealant/adhesive for electronic assemblies  

Environmental Sealing (IP68 Possible)  

ESD control/grounding  

Electrical connection/bonding of materials with dissimilar thermal expansion coefficients i.e.  

mounting shielded windows EMI shielding with environmental sealing (IP68 possible)  

Available Sizes  

Our adhesives are available 10cc, 30cc, 55cc, 170cc, 310cc  

(Manual or pneumatically dispensable syringes and cartridges)  

Storage  

It is recommended that when not in use that the material is stored in a cool dark, dry place.  

If the facility exists then some form of refrigerated or freezer storage is ideal.  

If kept properly sealed and in a suitable location then the material will remain usable for up  

to 4 months.  

Design Considerations  

Service conditions  

Galvanic compatibility  

Rigid or flexible bond  

Compatibility with substrate  

Ordering Information  

<Part number>-<Size>  

(e.g. <part number>-310 for a 310cc cartridge of silver aluminium adhesive)  

Instructions For Use  

Surfaces should be clean dry and sound i.e. free from loose material.  

It is recommended that areas to be bonded are cleaned using a suitable solvent prior to applying  

the sealant.  

To ensure the highest level of electrical or shielding performance it is essential that the surfaces to  

be bonded have a low contact resistance. This means that materials that have a naturally occurring  

oxide layer such as aluminium alloys may need to be lightly abraded and cleaned directly prior to  

bonding.  

Once the adhesive has been applied to one surface, assemble the parts as soon as possible.  

Ideally within 5 minutes. In most cases parts may be handled after 12 hours but avoid stressing  

the joint until full cure has been achieved. Cure rate may be controlled by means of temperature.  

The adhesive will fully cure within 3 hours at 60°C. If curing at elevated temperatures be careful  

to avoid excessive adhesive outflow due to the uncured adhesive viscosity reducing during the  

curing process.  

Excess material should be removed by means of a spatula or similar implement. Smaller traces of  

the uncured material may be removed by wiping with a lint free cloth damped with methylated  

spirit, isopropyl alcohol or MEK taking care to observe the safety precautions required in using  

flammable/ harmful solvents of this type. A priming agent can be used for treating some difficult  

to bond surfaces.  

Handling  

When using this material observe usual standards of hygiene/practice. Avoid skin and eye  

contact, and work in a well-ventilated area. For more detailed information refer to the Material  

Safety Data Sheet  

Conductive Silicone Adhesives  

Data Table  

Nickel Plated Graphite  

Dark Grey  

Silver Plated Aluminium  

Light Tan  

Silver Plated Copper  

Tan  

Colour  

Cure Time  

Density  

12 Hours  

12 Hours  

12 Hours  

2.7 gcm  

2 gcm  

2 gcm  

Hardness  

60 Shore  

60 Shore  

60 Shore  

Volume  

Resistivity  

<0.01 ohm/cm  

>100Ncm  

<0.01 ohm/cm  

>100Ncm  

<0.01 ohm/cm  

>100Ncm  

Adhesion  

Attenuation  

100MHz to 10  

GHZ  

80-115dB  

80-115dB  

80-115dB  

Elongation  

100%  

100%  

100%  

Temperature  

Range  

-55 to 150°C  

-55 to 150°C  

-55 to 125°C