Electronics & Keypads
In electronics the silicone is not just a soft part — it is part of the electrical and thermal design. That changes which properties you have to specify.
We supply grades for silicone keypads and key buttons, connector and housing seals, potting and encapsulation, thermal interface pads, and cable insulation. Typical requirements are dielectric strength, volume resistivity, and a cure that does not bloom onto contacts.
Two problems come up again and again in this sector: contact resistance creeping up because of surface bloom, and white or coloured parts yellowing after reflow or long-term UV exposure. Both are formulation issues, and both are addressable — but only if they are written into the specification from the start.
Electrical properties
Dielectric strength and volume resistivity specified per grade, not assumed.
No contact contamination
Low-bloom cure so keypad contacts do not develop resistance over cycles.
Colour stability
Anti-yellowing formulations for white and pastel parts exposed to heat or UV.
Thermal conductivity
Filled grades for heat spreading in EV and power-electronics assemblies.
Material Ranges Used in This Sector
These are the product lines we normally quote for Electronics & Keypads. If your part needs something outside them, tell us the requirement — custom formulation is a normal request, not an exception.
What Ships With the Material
Every lot leaves with paperwork. What changes by sector is which documents your customer will ask to see.
- COA per batch — hardness, tensile strength, elongation, tear strength and specific gravity on the lot you receive.
- TDS — full curing and processing guidance, not a marketing sheet.
- Compliance declarations — FDA, LFGB, RoHS, REACH, PAHS and VOM as applicable to the grade.
- Third-party test reports — arranged on the specific grade you buy, through SGS or an equivalent laboratory.
Certificate copies are available for download, and we can issue a declaration naming your market and application.
Questions Buyers Ask About Electronics & Keypads
Usually three causes: the antioxidant package, an over-high cure temperature, or insufficient post-cure. It is rarely the base polymer. Tell us the process temperatures and we will propose a grade that holds colour through them.
By specifying a low-bloom cure and controlling post-cure, so no plasticiser or unreacted residue migrates to the contact surface. For critical keypads we also recommend a conductive carbon pill rather than relying on the silicone itself.
Yes, filled compounds for heat spreading. Conductivity and hardness trade off against each other, so the useful starting point is your watt density and the gap you need to fill.
