Screen Protector Guide: Full Glue vs Privacy vs Matte

Screen protectors are the accessory people buy fastest and think about least. They are also the one where the marketing is least useful — almost every listing claims the same hardness rating, so the number on the box tells you very little.

Here is what actually separates one protector from another.

Ignore 9H — nearly everything claims it

9H refers to a pencil-hardness scale, and it is close to universal: of the 548 protectors currently in our own catalogue, 442 state it. It is a floor, not a feature, and comparing two protectors on it tells you nothing.

The three things that genuinely differ are fit, adhesive type and finish.

Fit comes first

Protectors are cut per phone model. The cut-outs for the earpiece and front camera, and the exact width of the glass, are model-specific — so a protector for an iPhone 14 will not sit correctly on an iPhone 15, even though the phones look similar.

This is the single most common ordering mistake. Check the model name on the listing, and if your phone is not named, ask rather than assume. Our charger and cable finder will show you every protector and case we stock that names your exact model.

Full glue vs edge glue

• Full glue (full adhesive) — the adhesive covers the entire back of the protector. It bonds across the whole display, so it cannot lift at the corners, and there is no rainbow halo around the border.
• Edge glue — adhesive only around the perimeter, with the centre unbonded. Cheaper, but on any curved screen it lifts, traps dust and shows that halo.

On a modern phone with curved or rounded edges, full glue is the only sensible choice. It is what nearly everything we sell is.

Choosing a finish

Finish	Best for	The trade-off
Clear	Maximum sharpness and colour accuracy. The default.	Shows fingerprints and reflections.
Matte / anti-glare	Outdoor use, bright sun, gaming and drawing. Hides fingerprints.	Slightly softer, less crisp text.
Privacy	Reading messages on public transport or in open-plan offices.	Noticeably dimmer head-on; colours look flatter.
UV-cured	Steeply curved “waterfall” displays where nothing else adheres properly.	Fiddly to fit, needs the UV lamp, cannot be repositioned.

How privacy protectors work

A privacy protector carries a micro-louvre filter — microscopic vertical blinds, effectively. Straight on, you see the screen normally. From roughly 30 degrees off-axis, it looks black.

It genuinely works, and it is the right buy if you read anything sensitive in public. But be clear-eyed about the cost: some of the backlight is being blocked by design, so the screen is dimmer and you will run higher brightness, which costs a little battery.

When UV is the answer

UV protectors are applied with a liquid adhesive that is cured under a small lamp included in the box. Because the glue flows before it sets, it reaches into a steep curve that a pre-cut adhesive sheet would bridge over and lift from.

That makes it the standard answer for phones with heavily curved edges. The downsides are that fitting takes longer, it is messier, and once cured you cannot lift and reposition it.

Fitting it without bubbles

1. Clean the screen with the alcohol wipe, then the microfibre cloth. Any residue becomes a permanent bubble.
2. Lift dust with the sticky tab or a piece of tape — dust is what ruins fits, not technique.
3. Do it in a bathroom shortly after a hot shower if you can. The damp air holds dust down.
4. Align at the earpiece cut-out, then let the protector fall flat rather than pressing it down.
5. Small air bubbles usually work their way out within a day. A bubble with a hard centre is trapped dust — lift, remove it, and re-lay.

Does it stop a cracked screen?

Partly. It reliably stops scratches, and a tempered glass protector will often shatter in a modest drop and sacrifice itself, leaving the display intact. That is the protector doing its job, not failing.

What it will not do is save a screen from a heavy fall onto a hard edge. For that, a case with a raised lip matters far more — see our phone case guide.

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Ready to pick one? Browse all tempered glass protectors, or go straight to privacy screen protectors, matte screen protectors or UV screen protectors. To see everything cut for your exact phone, use the charger & cable finder. The rear camera glass is worth protecting too — it sits proud of the body and takes the impact every time a phone is put down face-up: see camera lens protectors.