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Dow Corning® Sealant Strips are supplied on rolls in widths up to 20 inches
(508 mm) and thicknesses from 0.03 inch to 0.17 inch (0.8 to 4.6 mm). The
sealant strips can be supplied in custom precut shapes or simply pre-slit at
certain intervals. The rolls are available with the strips backed with
Teflon, rubber, or foam. Teflon-backed versions are typically used as stamped
pads where additional abrasion resistance to the non-sealing surface is
required. Rubber-backed versions are typically used as stamped pads or gaskets
to offer sealing between two surfaces. They can also be used for wraparound
protection. Foam-backed versions are typically used as stamped pads where
applications prefer low compression force and easy and clean
re-enterability. Unbacked versions are typically used for wraparound
protection and are not offered in stamped shapes. All of these
forms are also available in a standard form (GT-10x0 series) or with enhanced
flame resistance and UV stability (GT-16x0 series).
These pre-cured gel materials have very long shelf life, but it is recommended
that the product be stored in the supplied packaging under controlled
conditions.
Special Case of Mixed Contact Sizes
When a mixture of contact sizes must be accommodated by a single gel grommet
seal, then the largest contact size and pitch will determine the gel
configuration. This situation is most common in electronic interfaces where a
few power contacts are required, but where most of the interface is low level
signals. The best solution is to segment the connector to isolate the larger
contacts and therefore allow different sealing solutions to optimize the
system.
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