PBT vs ABS Keycaps: Which Material Is Actually Better?

By MechKeyReview Team • • Blog

PBT keycap set next to ABS keycap set side by side, showing texture and color differences on a desk

When buying keycaps, the material choice comes before the color, the profile, or the legend style. Get it wrong and a $60 keycap set starts developing an unsightly shine in three months. Get it right and your keycaps will look the same after three years as they did on day one.

The two materials you'll encounter for almost every keycap set are ABS and PBT. They have fundamentally different properties, and knowing the difference makes the choice obvious for most buyers.

ABS Keycaps: The Default

ABS (Acrylonitrile Butadiene Styrene) is the plastic used in the majority of keycaps shipped with keyboards at every price point. It's the same plastic used in LEGO bricks — versatile, inexpensive to mold, and available in a huge range of colors.

Fresh ABS keycaps have a smooth, almost silky feel. They accept dye and paint well, which is why the most vibrant and color-accurate keycap sets (especially double-shot GMK sets) are made from ABS. The legends on double-shot ABS keycaps are extremely crisp and will never fade — the legend color is a second layer of molded plastic, not ink.

The shine problem
ABS plastic is soft and susceptible to friction. The natural oils in your fingers, applied thousands of times per day to the same key surfaces, gradually polish the surface of ABS keycaps. After 6–18 months of daily use, the most-used keys (space, shift, E, A, S) develop a visible shine — a greasy, reflective patch that is difficult to fully remove and impossible to reverse.
ABS advantagesWider color range · Crisper legends on double-shot sets · Lower price · More legend manufacturing options (double-shot, dye-sub, laser, pad print)
ABS disadvantagesDevelops shine with use · Softer material · Slightly higher-pitched sound · Less resistant to solvents

PBT Keycaps: The Upgrade

PBT (Polybutylene Terephthalate) is a harder, denser plastic that resists the polishing effect that ruins ABS keycaps. Its crystalline molecular structure means the surface stays consistently textured even after years of daily use.

PBT keycaps feel slightly different from ABS on the fingertip — slightly rougher and more matte. Many typists prefer this texture because it provides more friction, keeping fingers positioned more consistently on the home row. The sound profile is also slightly different: PBT keycaps produce a marginally deeper, denser thud compared to ABS.

The texture realityPBT keycap texture varies significantly by manufacturer. Cheap PBT (common in budget keyboards) can feel grainy and unpleasant. Premium PBT from manufacturers like Akko, Drop, or EnjoyPBT has a smooth but clearly matte texture that most enthusiasts prefer.
The color limitationPBT is more difficult to dye than ABS, which limits the range of achievable colors. Very vivid colors (bright reds, deep blues, rich greens) are harder to achieve accurately in PBT. This is why colorful, designer keycap sets (like GMK sets) are almost always ABS — PBT simply can't match the color reproduction. PBT is strongest in classic colorways: white, beige, gray, black.
PBT advantagesResists shine and wear · Harder, more durable material · Slightly deeper sound · More consistent texture over time
PBT disadvantagesMore limited color range · More expensive to manufacture · Legends can be less crisp on some sets · Harder to achieve double-shot (most PBT uses dye-sub)

Head-to-Head Comparison

AttributeABSPBT
Surface feelSmooth, slightly slipperyMatte, slightly textured
Shine resistanceDevelops shine in 6–18 monthsResists shine for years
SoundSlightly higher-pitchedSlightly deeper, denser
Color accuracyExcellent — wide rangeLimited — best in muted tones
Legend durabilityExcellent (double-shot) or poor (laser/pad print)Good (dye-sub, legends last forever if done right)
PriceLower at entry levelSlightly higher at equivalent quality
HardnessSofterHarder, more rigid

When to Choose ABS vs PBT

Choose ABS when:
You want a specific colorway that only exists in ABS · You're buying a premium double-shot set (GMK, Signature Plastics) where legend quality and color accuracy matter most · You clean your keycaps regularly and don't mind the shine over time
Choose PBT when:
You want keycaps that still look new after 2–3 years of daily use · You prefer a matte, textured surface · Your colorway works in PBT (white, beige, gray, black all look great) · You're on a budget but still want quality (good PBT starts at $25–35)

Our Recommendation

PBT

For most people building or upgrading a mechanical keyboard: start with PBT. The shine resistance alone justifies it, and you will notice the difference within the first year of use. The texture grows on you quickly, and the slightly different sound profile is generally considered a positive by enthusiasts.

If you have your heart set on a specific colorway that only exists in ABS (which is common for popular GMK sets), buy the set you want — just know that regular cleaning and occasional keycap rotation will help manage the shine.

Frequently Asked Questions

Partially. Deep cleaning with dish soap removes oils and temporarily restores some of the original texture. Some people lightly sand ABS keycaps with very fine sandpaper (2000+ grit) to restore texture — this works but permanently changes the surface. There's no way to fully reverse years of shine.

POM (Polyoxymethylene, also called Delrin) is a third keycap material used in some premium sets. It's even harder than PBT, has a natural lubricity that produces a distinctive smooth feel, and sounds distinctly different — deeper and more resonant. POM keycaps are rare and more expensive. The HHKB Professional uses PBT; custom POM sets are an enthusiast item.

Yes, but subtly. PBT adds a slightly lower-frequency component to the keystroke sound. The effect is real and measurable but not dramatic — it's one of many factors that contribute to a keyboard's overall sound profile, along with case material, mounting style, and switch type.

Yes. Thicker keycaps (1.4–1.5mm) are denser, sound slightly deeper, and feel more substantial under the fingers. Budget keycaps (including many that come stock on keyboards) are often 1.0–1.2mm and produce a higher-pitched, hollower sound. Most premium PBT sets are 1.5mm.

Physically yes — the stems are standardized. Sonically, you'll notice some keys sound slightly different than others. For modifiers or accent keys this is sometimes done intentionally for a two-tone look. For a consistent typing experience, keep keycaps in the same material.

Next: understand keycap profiles before buying → Keycap profiles explained: SA, OEM, Cherry, DSA, XDA

Best mechanical keyboards 2026