How to choose between P+R keypads and full silicone rubber keypads?

Question

Accepted Answer

Choose a full silicone rubber keypad when you need low cost, fast tooling, soft tactile feel, and excellent waterproofing in one piece. Choose a P+R (plastic + rubber) keypad when you want a premium plastic surface, sharper legends, higher wear resistance, or a rigid keycap feel on top of a silicone actuation layer. FromRubber builds both, and the right choice usually comes down to aesthetics, environment, and unit volume.

Buyers often frame this as "Which is better?" but the honest answer is "Better for what?" We have tooled and produced thousands of both full-silicone and P+R keypads, and the projects that run smoothly are the ones where the choice is made on real requirements — not on which sample happened to feel nicest on the first press.

Silicone keypad versus plastic rubber P+R keypad comparison

What each construction actually is

A full silicone rubber keypad is a one-piece elastomer component: the keys, webbing, conductive pills, and mounting rim are all molded from silicone in one compression or LSR shot. It is inherently sealed, soft to the touch, and extremely tolerant of small design changes because there is only one mold and one material set to manage.

A P+R keypad (Plastic + Rubber) is a hybrid. Rigid plastic keycaps — usually ABS, PC, or PBT — are bonded or insert-molded onto a silicone rubber base that provides the travel, rebound, and electrical contact. You get the crisp surface finish and dimensional precision of plastic plus the soft actuation of silicone.

Six decision factors that should drive the choice

▪Surface appearance. P+R wins if you want a glossy, piano-black, or metallized keycap. Full silicone can be coated or sprayed, but it will always look and feel like rubber.

▪Legend durability. Plastic keycaps carry laser-etched or double-shot legends that survive >500,000 abrasion cycles. Silicone legends depend on printing or spray-laser, which are good but not as permanent.

▪Waterproofing. Full silicone is naturally monolithic and easy to seal to IP67. P+R can reach IP67, but it needs gasket design and careful bonding control because the plastic-to-rubber interface is a potential leak path.

▪Tooling cost and lead time. Full silicone needs one mold and usually 2–4 weeks. P+R needs a plastic cap mold plus a silicone base mold, plus bonding or overmolding fixtures — count on 4–6 weeks and roughly 1.5–2x the tooling investment.

▪Tactile feel. Full silicone feels softer and more compressible. P+R feels firmer and more precise because the rigid cap stops the press cleanly.

▪Volume and unit cost. At very high volumes, P+R can amortize its extra tooling. At low to medium volumes, full silicone is almost always cheaper.

Custom silicone keypad manufacturing options

Case study: industrial handheld scanner

A logistics OEM asked FromRubber to quote a 20-key keypad for a warehouse handheld scanner. Their original request was P+R because the industrial design team wanted a glossy black surface. After reviewing the spec, we pointed out three things: the device would be dropped 1.5 m onto concrete, operated with gloves in dusty aisles, and had a target life of only 200,000 cycles.

We recommended full silicone with a PU-coated surface and laser-etched legends. The reasoning: the scanner did not need the abrasion advantage of plastic because 200k cycles is well within coated silicone capability; the monolithic body absorbed drop shock better; and the single mold cut tooling from $6,800 to $3,200. The customer accepted, and field returns related to key cracking or delamination have been zero over 18 months.

Silicone keypad price factors and tooling cost comparison

Side-by-side comparison data

Decision factor	Full silicone keypad	P+R keypad
Tooling cost (typical)	$800–$5,000	$2,000–$10,000
Tooling lead time	2–4 weeks	4–6 weeks
Surface finish	Soft, rubber matte	Glossy, rigid, premium
Waterproof rating	IP65–IP67 easily	IP54–IP67 with sealing design
Legend durability	Good with PU / epoxy	Excellent, laser-etched plastic
Best volume fit	1,000–500,000 pieces	10,000+ pieces
Typical applications	Remote controls, medical, meters	Automotive, POS, premium appliances

Our recommendation: start with a ranked list of requirements — waterproofing, surface look, budget, and volume — then compare each construction against that list. If you are still unsure, prototype both. FromRubber can produce full-silicone and P+R samples from the same industrial design so you can make the decision with parts in hand.

What each construction actually is

Six decision factors that should drive the choice

Case study: industrial handheld scanner

Side-by-side comparison data

Related questions