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PERMABOND UV612
Permabond UV612 — UV/light-activated adhesive, Shore D 30-40.
Crystal-Clear highly flexible UV adhesive — low viscosity for high-quality glass grinding bevels.
Documents
Internal reference:
49-612.FL
HS code:
3506.9190000
Permabond UV612 is a crystal-clear, low-viscosity and highly flexible UV-curing adhesive — designed for glass bonding with stress reserve and high optical clarity.
With a Shore D hardness of 30–40, UV612 is significantly softer than standard glass-to-metal UV adhesives. This flexibility buffers thermal stresses between glass and metal—important for components subjected to large temperature fluctuations or dynamic loads.
The crystal-clear optics and stability under ambient light (fluorescent lamps) make UV612 the choice for high-quality glass cut bevels and glass art that require further processing after application.
Crystal-Clear, highly flexible UV adhesive — its low hardness (30–40 Shore D) buffers thermal and mechanical stresses between glass components. Daylight-stable — processing possible after application.
What distinguishes Permabond UV612
What is Permabond UV612 used for?
processing
Recommended accessories
Important instructions
Which Permabond UV adhesive is suitable for which application?
Permabond UV612 in direct comparison with related products of the UV series.
Permabond UV612 Current product | Permabond UV675 → | Permabond UV620 → | Permabond UV670 → | |
|---|---|---|---|---|
| Application | Crystal-Clear UV adhesive, low viscosity | Hardener (60–70 Shore D) | Standard harder | A bit harder |
| viscosity | 450–650 mPa·s @ 20 rpm | 500–800 mPa·s | 2,200–2,900 mPa·s | 2,000–3,000 mPa·s |
| Substrate strength | 8–12 N/mm² | 8–12 N/mm² | 9–10 N/mm² | 6–10 N/mm² |
| Elongation at break | >50 % | >50 % | >80 % | >80 % |
Technical data for PERMABOND UV612
| Product information | |
|---|---|
| Manufacturer | Permabond Engineering Adhesives Ltd |
| brand | Permabond |
| Container | 50 ml, 200 ml |
| Country of origin | Italy |
| Performance at final strength | |
|---|---|
| Tensile strength (ISO37) | >5 N/mm² |
| Refractive index | >1,490 |
| Elongation at break (elasticity) (ISO37) | >50% |
| Dielectric strength | 12 kV/mm |
| Dielectric constant 1MHz at 25°C | 4 |
| Water absorption (ISO62) 2 hours in boiling water | >2% |
| Physical properties | |
|---|---|
| Color | colorless |
| Chemical group | Methacrylic acid esters |
| Viscosity (adhesives) | Low viscosity <500 MPas |
| Viscosity 20rpm | 450-650 |
| Specific gravity | 0.95 |
| Curing values | |
|---|---|
| Curing wavelength | 365-400 nm |
| Mechanical properties | |
|---|---|
| Hardness (Shore D) | 30-40 |
| Thermal properties | |
|---|---|
| Operating temperature (°C) | -55 to +120 |
| Storage temperature (°C) | 5-25 |
For binding values, please refer to the technical data sheet (TDS) in the "Documents" tab.
Frequently asked questions about Permabond UV612
Practical application and design questions — answered by SILITECH.
Permabond UV612 is a methacrylate ester (UV-curing) adhesive with a viscosity of 450–650 mPa·s @ 20 rpm. This low-viscosity, crystal-clear UV adhesive is flexible, non-yellowing, and suitable for ground glass. The adhesive cures upon exposure to UV light in the 365–400 nm spectral range, providing instant curing on demand.
Permabond UV612 cures in the spectral range of 365–400 nm. Standard mercury vapor UV lamps, LED UV lamps with a suitable wavelength, or UV light guide systems are all suitable. For LED lamps, the maximum wavelength of the LED must be matched to the curing spectrum of the adhesive—we are happy to advise you on selecting the right lamp.
Permabond UV612 typically cures in: 10–15 s with a 4 mW/cm² low-power lamp; 2–3 s with a 100 mW/cm² LED lamp; 1–2 s with a 30 W/cm² UV light guide system. The exact curing time depends on the layer thickness and the light transmittance of the components.
Permabond UV612 bonds reliably to glass/steel: 8–12 N/mm². For thermoplastic substrates, we recommend testing compatibility before series production — release agents on injection-molded parts can impair adhesion.
Permabond UV612 is a low-viscosity, crystal-clear UV adhesive (450–650 mPa·s @ 20 rpm viscosity, >50% elongation at break). Permabond UV675 is a crystal-clear hardener (500–800 mPa·s, >50% elongation at break) — hardener (60–70 Shore D).
When stored at 5 to 25 °C and protected from light, Permabond UV612 is stable until the printed expiration date. IMPORTANT: UV adhesives cure upon contact with light — always store the bottle in the dark and only open it briefly under UV-blocked light. Daylight-stable variants (e.g., UV675) can be used briefly under ambient light.
From the Permabond UV range, select according to substrate, viscosity, and special properties: Permabond UV612 (Crystal-Clear UV adhesive, low viscosity); Permabond UV675 (Crystal-Clear, harder); Permabond UV620 (Optically clear, standard); Permabond UV670 (Flexible, impact-resistant). For shadowed areas (where UV light does not fully reach the adhesive gap), a dual-cure variant such as Permabond UV7141 (UV + anaerobic) should be used.
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Product specifications
| Product information | |
|---|---|
| Container | 50 ml or 200 ml |
| Manufacturer | Permabond Engineering Adhesives Ltd |
| brand | Permabond |
| Country of origin | Italy |
| Performance at final strength | |
|---|---|
| Tensile strength (ISO37) | >5 N/mm² |
| Refractive index | >1,490 |
| Elongation at break (elasticity) (ISO37) | >50% |
| Dielectric strength | 12 kV/mm |
| Dielectric constant 1MHz at 25°C | 4 |
| Water absorption (ISO62) 2 hours in boiling water | >2% |
| Physical properties | |
|---|---|
| Color | colorless |
| Chemical group | Methacrylic acid esters |
| Viscosity (adhesives) | Low viscosity <500 MPas |
| Viscosity 20rpm | 450-650 |
| Specific gravity | 0.95 |
| Curing values | |
|---|---|
| Curing wavelength | 365-400 nm |
| Mechanical properties | |
|---|---|
| Hardness (Shore D) | 30-40 |
| Thermal properties | |
|---|---|
| Operating temperature (°C) | -55 to +120 |
| Storage temperature (°C) | 5-25 |
| Keywords | |
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| Keywords | |
Documents and datasheets
Safety Data Sheets (SDS) and Technical Data Sheets (TDS) are available for download: