Recommendations for NuSil’s Primers
Adhesion is a critical property for numerous applications involving silicone materials. Silicone primers
are often used to improve adhesion between silicones and various substrates. The proper handling and
application of silicone primers can enhance the overall strength and consistency of bonds. The following
procedures are recommended for best bonding results:
Storage and Handling
Pour out amount needed for use.
Discard unused primer. Do not place back in
Containers should remain sealed when not in
use. The primer will hydrolyze in the presence of
It is recommended to fill empty space in the
container with a dry gas, such as argon or
nitrogen, before sealing container (original or
secondary container). The appearance of white
solids indicates that the primer is hydrolyzed
and will no longer aid in adhesion.
Recommended Materials / Conditions
Gloves - Use vinyl or nitrile gloves when handling parts.
Latex gloves are known to cause cure inhibition of silicone
where the gloves come into contact with the surface to be
primed. This applies to platinum cure (also known as Addi-
tion Cure) silicones.
Cleaning Agent - Electronic grade Isopropylalcohol (IPA) is
recommended as it does not leave residues and evaporates
Foam Wipes - Use clean-room grade wipes. Avoid using
wipes that may contain dust, oil, and fibers. These items can
cause interference with the primer reaction.
Solvents - Typically VM&P naphtha or xylene (NuSil’s
Ventilation - Apply standard safety procedures when working
with flammable materials.