CHO-SEAL REINFORCED
ELASTOMER SEALS
CHO-SEAL reinforced conductive
and non-conductive elastomer seals
consist of a corrosion-resistant CHO-
SEAL conductive or non-conductive
elastomer base, reinforced with a
woven or knitted fabric material,
or wire mesh. These seals are
intended for use in airframe shielding
applications or any other applications
requiring a reinforced seal. The
integrally molded reinforced material
provides improved mechanical
properties, while maintaining
the electrical properties of the
conductive elastomer base materials.
CHO-SEAL reinforced seals are used
to provide EMI shielding, lightning
protection, HIRF protection and radar
cross section reduction by maintaining
surface electrical continuity at joints,
seams and openings in air frames.
Conductive Elastomer Molded
Reinforced Seals
Knitted Dacron fabrics are
used as reinforcing layers
to dramatically increase the
tensile and tear strength
of the elastomer without
adding weight to the seal.
If applicable, layers of
aluminum or wire mesh are
used to provide high current-
carrying capability required
for lightning strike protection.
Other reinforcing materials are
available to provide resistance
to flame.
Refer to Parker Chomerics Conductive Elastomer EMI
Gaskets Molded and Extruded Materials Selector Guide
for details
Typical applications include, but are
not limited to; electronic bay doors,
wing panel access covers, engine
pylons, radomes and nacelle seals.
Parker Chomerics can design and
develop reinforced custom cross
sections, shapes and sheets to meet
specific customer requirements.
CHO-SEAL 1285, CHO-SEAL 6502,
CHO-SEAL 1287, CHO-SEAL 1298 and
CHO-SEAL 6503 corrosion-resistant
silver-plated-aluminum and silver-
plated nickel filled standard Mil/
Aero silicones and fluorosilicones
are typically used for the conductive
elastomer base material.
Contact Information:
Parker Hannifin Corporation
Chomerics Division
77 Dragon Court
Woburn, MA 01801
phone 781 935 4850
fax 781 933 4318
chomailbox@parker.com
www.chomerics.com
www.parker.com/chomerics
ORDERING PROCEDURE
CHO-SEAL Reinforced Conductive Elastomer Seals are produced as
custom orders. Contact Parker Chomerics Applications Engineering
Department to review your requirements.
Table 1: Typical Non-Conductive Environmental Sealing Molded Elastomers
Silicone Per A-A-59588 (ZZ-R-765)
Class 2A and 2B
Fluorosilicone Per MIL-R-25988B
Type 2, Class 1
Grade Grade
40 40
50 50
60 60
70 70
80 80
For applications on aluminum with
conductive materials in salt fog
environments, Parker Chomerics
recommends that mating flange
surfaces be protected with CHO-
SHIELD® 2001 or 2002 conductive
coatings for maximum corrosion
protection. (See Parker Chomerics
Conductive Compounds brochure for
additional information.)
Molded Reinforced Elastomer Seals - Product Information
CHOMERICS is a registered trademark of Parker Hannin Corporation. ® 2010
www.chomerics.com
www.parker.com/chomerics
TB 1075 EN April 2012