UV bonding: what it is and where it's used
Polymer, ultraviolet, 0.2 mm seam. The tech that replaced silicone in premium segments. Where it's critical and where it's overspend.
Silicone is "stick it with adhesive." UV bonding is "weld it with polymer." Twenty-five years of engineering separate them, with only a 15–20% price gap — but the aesthetics and durability are on different planets.
01The physics
A clear photopolymer (Loctite 350 or Bohle VERIFIX) is applied between two glass panels. 0.1–0.3 mm layer. A 365 nm UV lamp cures the seam in 30–60 seconds — the polymer bonds with glass at molecular level.
Result: up to 35 MPa tensile strength. That's stronger than the glass itself in tension. The seam is tougher than the material it joins.
02Where it's critical
Aquariums
Silicone yellows in 2 years, leaving "6+5 mm glass + yellow 4 mm seams." UV bonding stays clear for decades. 0.2 mm seam is essentially invisible.
Boutique and museum vitrines
Glass case for watches, jewellery, artefacts. With metal corners it's "packaging." With a UV seam it's the exhibit itself.
Custom showers without vertical clamps
All-glass construction with no vertical metal profiles. UV-bonded glass joints create a seamless "endless" wall.
032026 prices
| Seam type | Angle | Per lin.m |
|---|---|---|
| Classic 90° | standard | from 1 400 ₽ |
| Bevelled 30/45/60° | chamfer | from 1 800 ₽ |
| 180° butt joint | panel extension | from 1 600 ₽ |
| T-joint | internal divider | from 2 200 ₽ |
| Decorative antique | tinted | from 2 400 ₽ |
One of our most common "bonding only" orders: client brings their own glass blanks, we bond and return them. From 1 400 ₽/lin.m of seam.
04This service at REAL GLASS
If you've read this far, the topic is probably relevant to a real project. We make uv bonding in-house in St. Petersburg, with a measure within 1–3 days, 1-year warranty and a fixed contract price. All numbers in this article come from our actual 2026 quotes.
For a project-specific estimate — see the service page or request a free on-site measure.
