Custom Silicone Rubber Keypads
One-piece molded rubber keypads — silicone key arrays with real travel, soft feel, integral sealing, and −40 °C starts, for tooling costs a fraction of rigid plastic.
A silicone keypad is a one-piece molded elastomer key array. The tactile snap comes from the webbing geometry around each key — design the web angle and wall thickness right and you get real travel, soft feel, and integral sealing. Essen Industries supplies them from Taiwanese factories — standalone, or integrated into a full box build — with the two failure points of cheap keypads, coating durability and force-curve consistency, specified and inspected either way.
Constructions we supply
Conductive carbon pills
Molded into each key; the keypad is the switch, closing on your PCB's interdigitated pads. Contact resistance ≤200 Ω typical.
Non-conductive actuators
Silicone plunger drives metal domes or tact switches on your board — silicone feel with dome-crisp click.
Plastic + rubber (P+R)
Rigid keycaps bonded to a silicone web — hard-key looks, soft-key economics. The remote-control construction.
Integral gaskets & bosses
Perimeter sealing ribs, locating bosses, and light-pipe wells molded in.
Typical specifications
| Material | Silicone rubber, 30–80 Shore A; 40–60 common for keys |
|---|---|
| Actuation force | 60–250 g, set by web geometry; click ratio ~40–60% |
| Travel | 0.5–2.5 mm |
| Life | 1M–5M actuations, geometry- and coating-dependent |
| Operating temperature | −40 °C to +105 °C continuous |
| Contact resistance | ≤200 Ω (carbon pill) |
| Colors | Custom PMS-matched base compounds; translucent bases for backlighting |
| Tooling | Compression molds, typically a few $K; cavity count scaled to volume |
Typical values — confirmed per design at quote.
Options that earn their cost
PU (polyurethane) coating
The standard abrasion answer; matte feel, wipeable.
Parylene coating
Vapor-deposited — the premium option for chemical exposure and high-wear keys.
Laser-etched backlit legends
Opaque topcoat over translucent silicone, legends ablated by laser — light-tight by day, crisp glow at night, and the legend can't wear off because it's a hole, not ink.
Epoxy-capped keytops
Hard, glossy, glass-like key faces on a silicone body.
The notes we make constantly
A free sample of what comes back with every quote.
If the current pad "feels mushy," it's usually click ratio, not durometer — reshaping the web fixes what a harder compound won't.
Backlighting? Decide before tooling — translucent base + opaque coat + laser etch must be designed together, not retrofitted.
P+R keycap gates and web attachment points decide long-term key wobble; we review cap geometry at DFM, not after the first 10K units.
What goes wrong — and how we prevent it
We don't run the presses; we spec the materials by name, qualify the factory, and inspect for exactly these failure modes.
Coating wear
Shiny-then-sticky keys → PU or parylene specified to the wear environment, not omitted.
Mushy feel
Web geometry reshaped for click ratio, verified against a signed-off feel sample.
MOQs, lead times & tooling
| MOQ | Typically 250–500 pieces |
|---|---|
| Tooling | Typically 3–4 weeks; molds owned by you |
| Production | Typically 4–6 weeks ex-factory + air freight; delivered |
| Origin | Made in Taiwan, ISO 9001 facilities, CO docs per shipment |
Ranges are typical — confirmed on your quote.
Frequently asked
Is a "rubber keypad" the same as a silicone keypad?
Yes. "Rubber keypad," "silicone keypad," and "elastomer keypad" all name the same part — a one-piece molded elastomer key array, where the elastomer is silicone rubber. If a drawing or RFQ says "rubber keypad," that's what we build. Essen isn't the keypad manufacturer; we're the US vendor of record, sourcing these from ISO 9001 factories in Taiwan on one US invoice, with coating durability and force-curve consistency inspected and warranted.
Our current keypad gets sticky and shiny after a year. Fixable?
Yes — that's coating failure (or the absence of one). PU coating handles normal abrasion; parylene handles solvents, sunscreen, and industrial handling. Send a worn sample; the wear pattern tells us which.
Can you mold multiple colors in one keypad?
Yes — multi-color molding for distinct key colors, plus printed or laser-etched legends on top. For complex layouts, P+R construction with printed caps is often cheaper than multi-shot molding; we quote both.
Do we really own the mold?
Yes — compression mold, documented with serials in a tooling-ownership letter and written into our factory agreements. If you move your program, the mold moves with you.
Send a drawing. Get a price and an opinion.
Every quote includes DFM notes on your drawing — what we'd change, what it saves, what it risks.