Glass-Only Repair: The Complete Technical Guide to Saving Money on Screen Damage

Every week at OnOff.gr, customers walk in with cracked iPhones and Samsung phones. The moment they hear the price for a genuine screen replacement, almost everyone asks the same question: "Can't you just replace the glass?" Yes. But not everywhere and not with just any equipment. Here's exactly what happens in the workshop and why the price difference is so massive.

What Glass-Only Repair Actually Means

A modern smartphone screen isn't one piece — it's two. On top sits the outer glass (Gorilla Glass, Ceramic Shield, or Sapphire Crystal, depending on the device). Underneath, bonded to it with specialized adhesive, lies the OLED or AMOLED panel — the expensive screen that displays the image.

Most drops only crack the outer glass. The OLED underneath stays intact. Glass-only repair removes that cracked glass without touching the OLED, then bonds new glass in its place — using OCA (Optically Clear Adhesive), an optically transparent glue specifically engineered for displays.

Why Most Repair Shops Don't Offer Glass-Only

The challenge is in that phrase "without touching the OLED." The glass and screen are bonded with that same OCA adhesive — in a 0.25mm layer that's nearly permanent at room temperature. Try separating them with a razor blade or handheld heat gun, and the OLED cracks or clouds permanently.

You need equipment that costs €8,000–15,000 — and technicians who've performed hundreds of these repairs. At OnOff.gr, we use:

The Glass-Only Repair Process — Step by Step

1. Diagnosis: we first check if the OLED is intact If there are spots, lines, or dead pixels, we stop here — glass-only won't work. No point bonding new glass to a damaged display.
2. Heating with laser separator at 70–80°C Duration depends on the model — some iPhones (like the 15 Pro Max) need 10 minutes at this step due to stronger OCA adhesive.
3. Separating glass from OLED with metal spatula The motion must be smooth and steady. Any jerky movement can crack the OLED — this is why this step requires experience.
4. Cleaning OCA residue from the OLED surface With 99% isopropyl alcohol and lint-free cloths. No trace of old adhesive can remain — otherwise the new OCA won't bond properly.
5. Lamination: new glass + fresh OCA in the vacuum laminator 8–12 minutes under vacuum. The OCA polymerizes slightly and the glass bonds perfectly without bubbles.
6. UV curing in the UV oven to harden the adhesive 3–5 minutes with 365nm ultraviolet radiation. After this, the OCA is fully cured and optically clear.
7. Final quality control We check image quality, touch response, uniform brightness, absence of bubbles. Only then does the device leave the workshop.

When Glass-Only Repair Won't Work

It's not the solution for every cracked screen. Glass-only repair cannot be done when:

• The OLED has already cracked or shows spots, lines, dead pixels
• Glass fragments have penetrated the OLED-glass separation line (happens in severe edge or corner impacts)
• The device is an older model with non-separable display assembly

In these cases, the only correct option is replacing the entire genuine screen assembly.

How Much You Actually Save — Detailed Breakdown

These are OnOff.gr's current prices, including VAT, April 2026:

Questions We Get Asked Daily

Why We've Been Doing This Since 2018

Glass-only repair wasn't common practice in Greece in 2018. Most repair shops replaced entire screens because they lacked the equipment or training for separation.

At OnOff.gr, we invested early in the equipment — laser separator, OCA vacuum laminator, UV oven, autoclave — and started doing glass-only repairs first in Athens. Those thousands of repairs taught us when glass-only works, when it doesn't, and when to recommend the full replacement instead.