PBT vs ABS Keycaps: Which Should You Buy?

If you've spent any time browsing mechanical keyboard communities, you've probably seen the terms "PBT" and "ABS" thrown around constantly. They're the two most common keycap materials — and the debate over which one is better never seems to end.

The short answer? Neither is objectively better. Each material has real strengths and trade-offs, and the right choice depends on how you type, what you value, and what kind of sound and feel you're going for.

In this guide, we'll break down exactly how PBT and ABS keycaps differ — in texture, sound, durability, thickness, RGB compatibility, and price — so you can pick the best keycaps for your mechanical keyboard.

What Are PBT Keycaps?

PBT stands for polybutylene terephthalate. It's a thermoplastic polymer known for its hardness, heat resistance, and durability. In the keycap world, PBT is widely considered the premium keycap material — and for good reason.

PBT keycaps have a slightly rough, matte texture right out of the box. Unlike ABS, this texture doesn't wear down easily — even after months or years of heavy daily use, PBT keycaps resist the shiny, greasy look that many typists find unpleasant. This makes PBT the go-to choice if you want keycaps that look and feel new for a long time.

Because PBT is a harder and more brittle plastic, it also produces a deeper, thockier sound profile compared to ABS. That satisfying low-pitched keystroke — the "thock" that keyboard enthusiasts chase — is one of the main reasons people upgrade to PBT keycaps.

One trade-off: PBT is more difficult to mold with precision due to its higher shrinkage rate during manufacturing. This means PBT keycaps — especially cheaper ones — can sometimes have slightly warped spacebars or less crisp legends. High-quality sets have largely solved this, but it's worth keeping in mind when shopping at lower price points.

What Are ABS Keycaps?

ABS stands for acrylonitrile butadiene styrene. It's one of the most widely used plastics in the world, and it's the most common keycap material — especially on stock prebuilt keyboards.

ABS keycaps have a smooth, slightly glossy surface feel. They're softer and more flexible than PBT, which makes them easier to manufacture with tight tolerances and sharp legend detail. This is why many high-end custom keycap sets with complex colorways and detailed legends — like GMK keycaps — are made from ABS.

The biggest downside of ABS is keycap shine. Over time, the surface of ABS keycaps wears smooth from finger oils and friction, developing a noticeable greasy sheen. For some users, this is purely cosmetic. For others, it's the #1 reason they switch to PBT.

ABS also tends to produce a higher-pitched, clackier sound compared to PBT. Whether you prefer this comes down to personal taste — some builders specifically choose ABS for that brighter acoustic signature.

PBT vs ABS Keycaps: Head-to-Head Comparison

Keycap Sound: Thock vs Clack

Sound is one of the biggest reasons people choose one keycap material over the other — and it's the first thing you'll notice after swapping keycaps on your mechanical keyboard.

PBT keycaps are denser and harder, which gives them a lower-pitched, muted "thock" sound. If you watch keyboard sound tests on YouTube, the builds that sound deep and satisfying are almost always running thick PBT caps.

ABS keycaps produce a higher-pitched "clack" that's brighter and sharper. It's more pronounced and can sound very satisfying on the right switch and plate combo — there's a reason GMK ABS sets remain popular among sound enthusiasts.

Keep in mind that keycap material is only one factor in your board's overall sound profile. Switch type (linear, tactile, or clicky), plate material (aluminum, PC, FR4), case construction, dampening foam, and mounting style all play a role. But swapping from ABS to PBT (or vice versa) is one of the easiest and most noticeable keyboard sound mods you can make.

Keycap Thickness: Does It Matter?

Yes — keycap wall thickness directly affects both sound and feel.

Thick PBT keycaps (typically 1.3–1.5mm walls) produce a more solid, deeper keystroke. The extra mass dampens the higher frequencies, which is a big part of why PBT sounds thockier. Thicker walls also make the keycap feel sturdier under your fingers — less flex, less rattle.

Budget ABS keycaps are often noticeably thin (sometimes under 1.0mm), which makes them feel hollow and cheap. However, premium ABS sets like GMK use thicker walls (around 1.5mm), so thickness isn't exclusively a PBT advantage — it's a quality indicator regardless of material.

Keycap Shine and Durability

This is where PBT has a clear, undeniable advantage — and it's the most common reason people switch from stock ABS to aftermarket PBT keycaps.

ABS keycap shine is inevitable. Heavy typists may notice greasy-looking shine within just 2–4 weeks on high-use keys like WASD, spacebar, Enter, and Backspace. The surface gradually becomes smooth and reflective — some people describe it as "greasy keycaps," even when the keycaps are perfectly clean.

PBT keycaps are far more resistant to this. Their textured, matte surface holds up over extended use, maintaining that grippy feel for months or even years. If longevity and consistent keycap texture matter to you, PBT is the safer bet.

Yellowing is another durability concern — primarily for ABS. White or light-colored ABS keycaps can develop a yellowish tint over time, especially when exposed to sunlight or UV light. PBT is significantly more resistant to UV yellowing, which makes it the better choice for white keycaps and other light-colored sets that you want to stay looking clean.

Legend Printing Methods: Double-Shot, Dye-Sub, and More

The keycap material affects which legend printing methods work best — and this directly impacts how long your legends will last.

Double-shot molding is available for both PBT and ABS keycaps. Two layers of plastic are molded together — one for the keycap body and one for the legend character. Because the legend is a physical layer of plastic rather than printed ink, double-shot legends can never fade or wear off. Double-shot PBT keycaps give you the best of both worlds — PBT durability with permanent, razor-sharp legends.

Dye-sublimation (dye-sub) is primarily used on PBT keycaps. The dye is infused into the plastic under high heat, creating legends that won't fade with use. One limitation: dye-sub only works by printing darker colors onto lighter keycaps — you can't dye-sub white legends onto dark caps.

Pad printing and laser etching are cheaper methods found on budget keycaps of both materials. These legends will eventually wear off with regular use and are a telltale sign of a lower-quality keycap set. If you're spending more than $30 on a set, make sure you're getting double-shot or dye-sub legends.

RGB and Backlit Keycaps: PBT vs ABS

If your mechanical keyboard has RGB lighting, keycap material matters more than you might think.

ABS keycaps are generally better for RGB and backlit keyboards. Because ABS is thinner and slightly translucent, it allows LED light to pass through more easily. Most shine-through keycaps — the kind with translucent legends that glow when your RGB is on — are made from ABS. Pudding keycaps, a popular sub-category with translucent lower housings that create a dramatic underglow effect, are also predominantly ABS. If showing off your keyboard's lighting is a priority, ABS gives you brighter, more visible backlighting.

PBT keycaps are thicker and more opaque, which means they block most backlight. You'll still get a subtle glow around the edges of each keycap (underglow), but the legends themselves won't light up unless the set is specifically designed as backlit PBT keycaps with translucent legend inserts — these exist, but they're less common.

Color and Aesthetics

ABS has traditionally had the edge in color vibrancy. Because it's easier to work with during manufacturing, ABS can achieve more saturated, vivid colors — which is why premium ABS sets from brands like GMK are known for their striking, Instagram-worthy colorways.

PBT has caught up significantly in recent years. Modern PBT keycap sets are available in a wide range of colors, though they tend to lean slightly more muted or pastel compared to ABS. For many keyboard builders, this subtler aesthetic actually looks more refined and cohesive on a desk setup.

If you're specifically looking for bright, bold colorways, ABS may still have a slight edge. For clean, understated builds — think minimalist white keycap sets or muted earth-tone themes — PBT works beautifully.

Best Keycaps for Gaming vs Typing

One of the most common questions in the keyboard community: are PBT or ABS keycaps better for gaming? What about for typing and productivity?

For gaming: Both materials perform identically in terms of response time and input registration — keycap material has zero effect on your in-game performance. That said, gamers who play daily will notice ABS shine on WASD keys very quickly. If you game for hours every day and want your keycaps to stay looking fresh, PBT is the practical choice. If you want RGB shine-through legends for that gaming aesthetic, ABS has the edge.

For typing and productivity: PBT's matte, textured surface provides slightly more grip, which some typists find more comfortable during long writing sessions. The deeper sound profile is also less fatiguing to listen to over extended periods compared to the brighter clack of ABS. For office keyboards and daily work use, PBT is generally the better fit.

Keycap Profiles: What's Available in PBT and ABS?

Both PBT and ABS keycaps come in all popular keycap profiles — the shape and height of the keycap that determines how it feels under your fingers.

Cherry profile is the most popular sculpted profile — low-height, comfortable, and available in both PBT and ABS from virtually every keycap brand. It's the safe choice for most builds.

OEM profile is what ships on most prebuilt keyboards — slightly taller than Cherry, widely available in budget PBT sets. If you're upgrading from stock keycaps, OEM PBT is a familiar, comfortable transition.

SA profile is tall, spherical, and retro-styled — more commonly found in ABS, though PBT SA sets exist. If you like the vintage typewriter aesthetic, SA is worth exploring.

KOA profile is a newer mid-height option that's gaining popularity in the PBT space — comfortable, modern, and great for both typing and gaming.

The aftermarket PBT keycap market has expanded rapidly, and most keycap sets in the $30–$80 range today are PBT. Browse our full PBT keycaps collection to see what's available across every profile and layout.

Keycap Compatibility: Will They Fit My Keyboard?

Before buying any keycap set — PBT or ABS — make sure it's compatible with your keyboard. Here's what to check:

Stem type: The vast majority of mechanical keyboards use Cherry MX-compatible stems (the cross-shaped "+" mount). Both PBT and ABS aftermarket keycaps are designed for MX stems. If your keyboard uses Cherry MX, Gateron, Kailh, or any MX-clone switches, standard aftermarket keycaps will fit.

Layout: This is where compatibility gets tricky. Full-size (104-key) and tenkeyless (TKL / 87-key) layouts are universally supported by almost every keycap set. But if you have a 65%, 75%, or compact keyboard, check that the set includes the right-size modifier keys — especially the short right Shift (1.75u), small Backspace, and 1u bottom-row keys that some compact boards use.

Bottom row: Many gaming keyboards from brands like Corsair, Razer, and Logitech use non-standard bottom rows with different-sized modifier keys. Standard aftermarket keycap sets won't fit these keyboards properly — you'll need a set that specifically includes non-standard bottom row support.

How to Upgrade Your Keycaps

Swapping keycaps is one of the easiest and most impactful keyboard modifications you can make — no soldering, no disassembly, no technical skills required.

All you need is a keycap puller (a wire-style puller is gentler on keycaps than the plastic ring type). Pull off your old keycaps, press the new ones onto the switch stems, and you're done. The whole process takes about 10–15 minutes.

If you're upgrading from stock ABS keycaps to a quality PBT set, you'll immediately notice the difference in texture, sound, and overall typing feel. It's the single best bang-for-your-buck upgrade in the mechanical keyboard hobby.

So, Which Should You Buy?

For most people building or upgrading a mechanical keyboard today, PBT is the better all-around keycap material. It's more durable, sounds deeper, feels more premium, resists shine and yellowing, and the quality gap between PBT and premium ABS has narrowed considerably in recent years.

Unless you specifically want RGB shine-through legends or you have your heart set on a particular GMK colorway, a quality PBT keycap set will serve you well for years.

Frequently Asked Questions