Contact Information
Parker Hannifin Corporation
Chomerics Division
77 Dragon Court
Woburn, MA 01801
Phone: 781 935 4850
Fax: 781 933 4318
chomailbox@parker.com
parker.com/chomerics
Parker Chomerics CHO-SEAL 6750
is a low durometer, nickel-graphite
filled fluorosilicone EMI shielding
material. CHO-SEAL 6750’s high
temperature capability and chemical
resistance makes it a good choice
for environmental sealing and
shielding. As an electrically conductive
fluorosilicone elastomer, this new
material provides good EMI shielding
across a broad frequency spectrum
as well as providing environmental
sealing from dust, moisture, and even
challenging Ingress Protection (IP)
ratings. The fluorosilicone binder
provides additional fluid resistance
to harsh fluids and chemicals such as
machining oils, hydraulic fluids and
various fuels. CHO-SEAL 6750 is the
lowest durometer fluorosilicone-based
material in the Chomerics conductive
elastomer product family.
This product is only available in
molded, sheet stock, and die-cut
formats. Molded formats include
O-rings, D-rings, and custom shapes.
Sheet stock can be supplied with
an electrically conductive pressure-
sensitive acrylic adhesive (PSA)
for assistance during the assembly
process.
• Resistance to harsh chemicals
• Low compression force
• Cost effective EMI shielding
solution
• Higher temperature compatibility
• Available only in molded profiles,
sheets, or die-cut/water jet cut (no
grit)
• Can be supplied with an electrically
conductive pressure sensitive
acrylic adhesive (PSA)
• Military electronics housings
• Aerospace modules
• Connector interface seals
• Telecommunications equipment
• Industrial applications
CHO-SEAL
®
6750
Cost Effective, Low Durometer, EMI Shielding,
Chemically Resistant Fluorosilicone Elastomer
Product Features Typical Applications
PARKER.COM/CHOMERICS
CHO-SEAL 6750 Product Information
Note A: Compression set is expressed as a percentage of deflection per ASTM D395
Method B, at 25% deflection. To determine percent recovery, subtract 0.25 of the stated
compression set value from 100%. For example, in the case of 30% compression set,
recovery is 92.5%.
Note C: Copies of CEPS-0002, CHO-TP08 and CHO-TP09 are available from Parker
Chomerics. Contact Applications Engineering.
Note F: It may not be inferred that the same level of shielding effectiveness provided by
a gasket material tested in the fixture per MIL-DTL-83528 Para. 4.5.12 would be provided
in an actual equipment flange, since many mechanical factors of the flange design
(tolerances, stiffness, fastener location and size, etc.) could lower or enhance shielding
effectiveness. This procedure provides data applicable only to the test fixture design of
MIL-DTL-83528, but which is useful for making comparisons between different gasket
materials. The 40 GHz test data for all materials uses TP08 test method.
Typical Properties
†
CHO-SEAL 6750 Test Method
Physical
Molded (M) or Extruded (E) M --
Conductive Filler Nickel-Graphite --
Elastomer Binder Fluorosilicone --
Type (Ref. MIL-DTL-83528) Not Applicable --
Volume Resistivity, ohm-cm, max., as supplied without
electrically conductive pressure sensitive adhesive
0.050 CEPS-0002
(C)
(Q/C)
Hardness, Shore A 53 ±5 ASTM D2240 (Q/C)
Specific Gravity 2.03 ± 0.25 ASTM D792 (Q/C)
Tensile Strength, psi (MPa), min. 90 (0.62) ASTM D412 (Q/C)
Elongation, % min. 90 ASTM D412 (Q/C)
Tear Strength, lb/in. (kN/m), min. 25 (4.37) ASTM D624 (Q)
Compression Set, 70 hrs at 100°C, % max.
(A)
25 ASTM D395, Method B (Q)
Thermal
Low Temperature Flex TR10, °C, min. -65 ASTM D1329 (Q)
Maximum Continuous Use Temperature, °C 200 --
Electrical
Shielding Effectiveness, dB, min.
(F)
-- --
200 kHz (H Field) 55 CHO-TP08
(C)
(Q)
100 MHz (E Field) 129 CHO-TP08
(C)
(Q)
500 MHz (E Field) 100 CHO-TP08
(C)
(Q)
2 GHz (Plane Wave) 115 CHO-TP08
(C)
(Q)
10 GHz (Plane Wave) 117 CHO-TP08
(C)
(Q)
40 GHz (Plane Wave) Not Tested CHO-TP08
(C)
(Q)
RoHS Compliant Yes Chomerics Certification
UL 94 Flammability Rating Not Tested UL 94