For best results, units to be encapsulated or potted should be clean of
grease, oil and other surface contaminants. For gels and elastomers without
primerless adhesion, optimum adhesion is obtained with the use of a
primer. Gels typically rely on mechanical adhesion gained through their
sticky nature, but several are available with primerless chemical adhesion.
Common cleaners for substrate preparation include Dow Corning’s line of OS Fluids, isopropyl
alcohol, toluene and acetone. In most instances a quick wipe of the
surface is adequate to clean the module for potting.
Prior to potting, substrates should be kept in a clean area and protected
from accumulating potential contaminants such as dirt and dust.
If a primer is necessary, the Primer should be applied in a very thin coat
to clean, dry surfaces. For more information on selecting the right Dow
Corning Primer for your substrate and material and for application guidelines,
please refer to the Primers Product