When it comes to tempered glass, Spigen is the first name many people reach for — and testing it on the Galaxy Z Fold 8 quickly shows why. No other product in this test went on so cleanly and with so little stress. Even so, the glass has one characteristic that will spoil it for a lot of people. The price sits at around €25 for a two-pack.
- 9H+ Surface Hardness for Scratch Resistance: Resists scratches from keys, coins, and daily wear — keeping your screen looking new through everyday use
- 10H Surface Hardness for Scratch Resistance: Resists scratches from keys, coins, and daily wear — keeping your screen looking new through everyday use
- Crystal Clear with 100% Optical Clarity: Engineered to deliver the same vivid colors and sharpness as your bare screen — independently lab-tested at 100% clarity for true visibility
- Original Touch Experience Preserved: Ultra-thin 0.33mm glass maintains your screen's original touch sensitivity — no lag, no resistance, no difference
- Full Sensor Compatibility: Face Unlock works through the front camera. Always-On display, At-a-Glance, and edge gestures preserved at original brightnes
What’s Included: The Best Accessories in the Test
The set contains two tempered glasses, an alignment frame, a wet and a dry wipe, plus two dust-removal stickers. Those stickers deserve their own mention: they’re by far the best in the entire test. Three passes over the display and the surface is genuinely dust-free. By comparison, the stickers in the considerably more expensive Samsung set are so small that you pick up new dust faster than you remove the old. I ended up using the Spigen sticker to install the Samsung film.
Installation: Exemplary
The alignment frame is the real reason almost nothing can go wrong here. You place the phone inside, the frame sits over it with an exact fit, you peel off the protective liner, press down once — then wait 30 seconds. After that you lift the frame away, peel off the carrier film, and the glass is seated.
One warning though: don’t pull too hard on the release tab and don’t overdo the pressure. That tab tears off fairly easily at this point — and then the tempered glass is beyond saving.
Any remaining air bubbles along the edges push out without trouble. In my case only one larger bubble stuck around, and that eventually cleared too. Touch, fingerprint sensor and face recognition all work without any restriction after installation.
The Problem: The Size
And here’s the catch. The glass covers only the actual display area. All the way around, the Fold 8’s very wide black frame remains fully visible and uncovered. It simply doesn’t look good — to the point that, honestly, I’d rather live without tempered glass than with that appearance.
Making matters worse: dust collects along the visible edge of the glass over time. If you regularly carry the device in a pocket, you’ll eventually get a clearly visible dust ring there that emphasises the transition even more.
A buying tip for anyone who wants to avoid this problem: check the product images for whether the glass includes a black border extending all the way to the housing edge. Those versions look considerably more cohesive. Alternatively, a case with a raised front lip conceals the transition so the glass sits flush.
Anti-Reflective: Advertised, But Barely Measurable
The packaging promises an anti-reflective effect. I tested that directly by peeling off a second glass and sticking it on the display at an angle — that way both areas can be compared side by side under the same bright light. The result: yes, a minimal difference is detectable. But it’s so slight that I wouldn’t accept it as a buying argument. If glare reduction genuinely matters to you, you need a different product.
What Tempered Glass Does — And What It Doesn’t
The decisive advantage over a film is drop protection. If the device falls onto asphalt, the hardened glass breaks in place of the display. A film can’t do that — it protects against scratches only. So if you’re after real insurance for the front display, there’s no way around tempered glass.
Verdict
The Spigen is currently the best choice for the Z Fold 8’s outer display — not because it’s flawless, but because the installation is unmatched across the entire test field and it delivers genuine drop protection. The undersized coverage remains a real criticism you should know about before buying. Better versions may well arrive on the market soon.
For the foldable inner display, incidentally, this glass isn’t an option at all — hardened glass would crack the first time you folded the device. Which solution actually works there, and how all three tested products compare directly, is covered in my breakdown of which Z Fold 8 screen protector actually holds up.