Super Shield
TM
Water Based Silver Coated Copper
Conductive Coating
843WB Technical Data Sheet
843WB-Liquid
Description
The 843WB
Super Shield
TM
Water Based Silver Coated Copper Conductive Coating
is a one-part urethane
system pigmented with highly conductive silver coated copper flake. It is easy to use, with no let-down,
and no heat cure necessary. It can be applied by spray, brush, or roller. The cured coating is smooth,
durable, and adheres well to plastics, wood, metal, and ceramics. It also bonds well to drywall and can be
painted over with common architectural paints.
Applications & Usages
This coating provides highly effective EMI/RFI shielding across a broad range of frequencies in
architectural and electronic applications.
Water based conductive paints are the only choice for architectural RFI shielding applications because VOC
regulations prohibit the use of solvent based systems. Such applications include containing RFI within a
room such as an engine room to prevent interference across other rooms. Also, it can be used to protect a
room containing sensitive electronic equipment from general sources of interference, such as server
rooms, recording studios, laboratories, and surgical rooms, especially those near cell phone or radio
towers.
This product is also great for providing EMI/RFI shielding to electronic enclosures, sensors, test
equipment, portable controllers, communication devices, and most applications where one would normally
use solvent based shielding.
This product also good for repairing conductive traces and electronic prototyping.
Benefits and Features
•
•
•
•
•
•
•
•
•
•
•
•
•
Provides excellent EMI/RFI shielding over a broad range of frequencies
Volume resistivity of 6.82 x 10
-4
cm
Can be applied by spray, roller, or brush
One-part, ready-to-use system—no dilution required
Excellent adhesion to drywall and plastics
Can be painted over with common architectural paints
Safe even on the most delicate plastics
Good environmental resistance
Non-flammable
No noxious odors
Not regulated for air transport (non-DG)
Cures at room temperature
Low regulated VOC content allows for use in architectural applications
ENVIRONMENT
RoHS Compliant
Low-VOC
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Date: 03 April 2017 / Ver. 2.03
Super Shield
TM
Water Based Silver Coated Copper
Conductive Coating
843WB Technical Data Sheet
843WB-Liquid
Usage Parameters
Properties
Recoat Time (for plastic)
Recoat Time (for dry wall)
Drying Time @25 °C [77 °F]
Drying Time @65 °C [149 °F]
Shelf Life
Theoretical HVLP Spray
Coverage
a)
Value
20 min
5 min
24 h
2.5 h
1y
≤42
200 cm
2
/L
≤4
m
2
/L
≤24
800 in
2
/gal
≤172
ft
2
/gal
Temperature Ranges
Properties
Constant Service
Temperature
Intermittent Temperature
Limits
Storage Temperature
Limits
Value
-40 to 120 °C
[-40 to 248 °F]
-50 to 125 °C
[-58 to 257 °F]
-20 to 27 °C
[-4 to 80 °F]
A
TTENTION
!
The product gels below
0 °C [32 °F]. If the product was exposed to
freezing temperature, keep at 22 °C [72 °F] for
2 days prior to use.
a) Idealized estimate based on a coat thickness
of 38
m
[1.5 mil] and 65% transfer efficiency.
Properties of Uncured 843WB
Physical Property
Color
Viscosity @25 °C [77 °F]
Density @25 °C [77 °F]
Solids Percentage
Flash Point
Odor
Mixture
Light metallic brown
234 cP [180 mm
2
/s]
1.30 g/mL
42%
None
Musty
a)
a) Brookfield viscometer at 100 RPM with spindle LV S62
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Super Shield
TM
Water Based Silver Coated Copper
Conductive Coating
843WB Technical Data Sheet
843WB-Liquid
Properties of Cured 843WB
Electric Properties
Volume Resistivity
Surface Resistivity @1.9 mil
Surface Resistance
b)
Surface Resistance
1 coat @1.6 mil
Surface Resistance
2 coats @2.0 mil
Surface Resistance
3 coats @3.6 mil
Magnetic Class
Relative Permeability
Shielding Attenuation
c)
for 50
m
[2 mil]
Shielding Attenuation
10 to 100 kHz
Shielding Attenuation
>100 kHz to 1 MHz
Shielding Attenuation
>1 MHz to 10 MHz
Shielding Attenuation
>10 MHz to 100 MHz
Shielding Attenuation
>100 MHz to 1 GHz
Shielding Attenuation
>1 GHz to 10 GHz
Shielding Attenuation
>10 GHz to 18 GHz
Physical Properties
Paint Type
Color
Abrasion Resistant
Blister Resistant
Peeling Resistant
Water and Salt Spray Resistant
Physical Properties
Adhesion on ABS
Polycarbonate
PVC
Polyamide Nylon
Glass
Aluminum
Stainless Steel
Pencil Hardness on ABS
Environmental & Ageing Study
Salt Spray Test: 7 day @35 °C +Salt/Fog
Cross-Hatch Adhesion
Cracking, unwashed area
Visual Color, unwashed area
Peeling, unwashed area
Method
Method 5011.5
in MIL-STD-883H
Calculated
Square probe
"
"
IEEE STD 299-1997
"
"
"
"
"
"
"
Method
—
Visual
—
—
—
—
Method
ASTM D3359
"
"
"
"
"
"
ASTM D3363
Method
ASTM B117-2011
ASTM D3359-2009
ASTM D661-93
ASTM D1729-96
ASTM D1729-96
Value
Resistance
a)
6.82 x 10
-4
cm
0.15
sq
Conductance
a)
1 470 S/cm
0.21
sq
4.7 S
0.11
sq
9.4 S
0.12
sq
8.6 S
Diamagnetic (non-magnetic)
<1.0
84
71
46
39
55
53
39
dB
dB
dB
dB
dB
dB
dB
to
to
to
to
to
to
to
89
89
67
59
68
64
58
dB
dB
dB
dB
dB
dB
dB
Value
Aliphatic polyurethane (Thermoset)
Light metallic brown
Yes
Yes
Yes
Yes
Value
5B
5B
4B
5B
0B
0B
0B
HB, Hard
Value
TBD
"
"
"
Note:
TBD = To be determined. One coat thickness is typically around 38
m
[1.5 mil].
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Super Shield
TM
Water Based Silver Coated Copper
Conductive Coating
843WB Technical Data Sheet
843WB-Liquid
a) Surface resistance is given in
sq
and the corresponding conductance in Siemens (S or
-1
b) Tested on acrylonitrile butadiene styrene (ABS)
c) Shield attenuation (with respect to a reference sample without shield isolation) is given for adjacent
frequency ranges and provides the minimal and maximal value registered within these ranges.
Shielding Attenuation
Aluminum Panel
120
843WB
Blank
100
Attenuation (dB)
80
60
40
20
0
0.01
0.1
1
10
100
1000
10000
100000
Frequency (MHz)
Figure 2.
Attenuation of 843WB coating at different frequencies
Compatibility
Chemical—The
silver coated copper is quite resistant to oxidation, except in environments that contain
contaminants like H
2
S or ozone which tarnish its surface.
The thermoplastic resin is dissolved by common paint solvents like toluene, xylene, acetone, and MEK.
This allows great coating repair and work characteristics, but it does make the coating unsuitable for
solvent rich environments.
Adhesion—The
843WB coating adheres to typical drywall coatings including latex paints and other water
based polyurethanes, and may be painted over with such paints as well.
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Super Shield
TM
Water Based Silver Coated Copper
Conductive Coating
843WB Technical Data Sheet
843WB-Liquid
Storage
Recommended storage between 16 to 27 °C [60 and 80 °F] in dry area. Do not store below -20 °C.
A
TTENTION
!
If exposed to freezing temperatures during storage or transport, keep product at
room temperature (22 ±3 °C) for at least 2 days prior to use. Ensure that the product is fully
homogeneous by stirring after a day and immediately prior to use. If agglomeration is still
present, wait an additional day before use.
Health, Safety, and Environmental Awareness
Please see the 843WB
Safety Data Sheet
(SDS) for greater details on transportation, storage, handling
and other security guidelines.
Environmental Impact:
The regulated volatile organic compound (VOC) content is 51 g/L.
Health and Safety:
The solvent system is mostly water, so the solvent system is quite safe.
HMIS® RATING
HEALTH:
FLAMMABILITY:
PHYSICAL HAZARD:
PERSONAL PROTECTION:
Approximate HMIS and NFPA Risk Ratings Legend:
0 (Low or none); 1 (Slight); 2 (Moderate); 3 (Serious); 4 (Severe)
NFPA® 704 CODES
* 2
0
0
0
2
0
Application Instructions
The 843WB Super Shield can be easily applied by the paintbrush or spray gun.
N
OTE
:
In all cases, the mixture should be kept slightly agitated during use to avoid premature settling of
the solids.
For best results, apply many thin coats as opposed to using fewer thick coats. We recommend a coat with
a dry film thickness of roughly 1 mil [25
m].
Follow the procedure below for ensure optimal conductivity.
Equipment and Supplies
•
•
•
•
Mixing spatula
Clean paint brush & an agitated paint container
OR
HPLV spray gun with agitator cup
Water and cleaning rags
Personal protection equipment (See 843WB-Liquid SDS)
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