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PERMABOND UV625

PERMABOND UV625

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Permabond UV625 — UV/light-activated adhesive, Shore D 60-70.

Thixotropic gel UV adhesive — vertical applications, high gap filling, impact resistant.

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  • brand
  • Container
  • Color
  • Country of origin
  • Chemical group
  • Viscosity (adhesives)
  • Viscosity 2.5 rpm
  • Viscosity 20rpm
  • Curing wavelength
  • Operating temperature (°C)
  • Storage temperature (°C)
  • Final strength
  • Tensile strength (ASTM D-2095-69)
  • Tensile strength (ISO37)
  • Refractive index
  • Elongation at break (elasticity) (ISO37)
  • Hardness (Shore D)
  • Dielectric strength
  • Dielectric constant 1MHz at 25°C
  • Water absorption (ISO62) 2 hours in boiling water
  • UFI (Unique Formula Identifier)

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UV-curing gel

 
General Terms and Conditions.

Shipping usually within 1 to 3 business days
(availability will be confirmed after ordering)

. Express logistics. Fast and reliable within Switzerland & Europe.

Shipping from Swiss warehouse within 24 hours. Batch certificate. Invoice within 30 days (B2B). Technical support.
Shipping & Delivery

Usually 1 to 3 working days

Availability will be confirmed after order receipt.

Express logistics within Switzerland & Europe.

General Terms and Conditions →

Product data

Internal reference: 49-625.FL

HS code: 3506.9190000

Internal reference: 49-625.FL
HS code: 3506.9190000

PERMABOND UV625
PERMABOND UV625
Permabond · Permabond Engineering Adhesives Ltd · SKU 49-625.FL

Permabond UV625 is a thixotropic UV-curing gel adhesive for glass-to-metal bonding — designed for vertical applications, larger gaps and joints with impact strength requirements.

With 30,000–55,000 mPa·s @ 20 rpm and 120,000–250,000 mPa·s @ 2.5 rpm, UV625 is truly thixotropic—its consistency keeps the adhesive firmly in place even in vertical bonding applications. The deep cure depth allows for the bonding of thicker layers.

The elongation at break of >60% and the tensile strength of 16 N/mm² (ISO37) make UV625 the choice for dynamically stressed glass-metal connections — glass furniture in everyday use, glass designs with higher tolerances.

SPECIAL FEATURE

Thixotropic gel UV adhesive with high gap filling and impact strength — its paste consistency ensures it remains stationary even in vertical applications. Deep cure depth for larger gaps.

Permabond UV625 in figures
gel
Doesn't drip
16 N/mm²
Tensile strength
>60 %
Elongation at break
1 s
@ 30 W/cm²

What distinguishes Permabond UV625

Thixotropic / Gel
Non-drip, stays in place in vertical bonding applications.
High gap filling
Curing depth for larger adhesive gaps.
Impact resistant
Flexible — good impact resistance of the bond.
Fast UV curing
1 second at 30 W/cm² optical fiber.
Excellent glass-to-metal adhesion
Standard for demanding bonding applications.
Yellowing resistant
Long-term stability.

What is Permabond UV625 used for?

Vertical glass-to-metal bonding
If liquid UV adhesives were to drip.
Glass designs with large gaps
Standard adhesives would not fill the gap sufficiently.
Impact-resistant glass furniture
Increased reserve against dynamic loads.
Overhead applications
The paste consistency allows application in any position.
Repair and maintenance
Selective application without expiration.

processing

1
Clean surfaces
Prepare bonding surfaces to be clean, dry, and free of grease — degrease with isopropanol or acetone. For aluminum/copper, lightly sand to remove the oxide layer. Test compatibility on plastics.
2
Apply adhesive thinly
Apply Permabond UV625 thinly and evenly – directly from the bottle or using a dispensing device. Keep the adhesive protected from light. Avoid air bubbles.
3
Adding and aligning components
Quickly and precisely assemble. When bonding glass, spread the adhesive into a thin film by applying pressure. Do not move components during UV curing.
4
Cure with UV light
Point the UV lamp at the adhesive gap. Curing time depends on the lamp power, wavelength, and light transmittance of the components — typically 1–5 seconds for a 30 W/cm² fiber optic system or 5–15 seconds for a 4 mW/cm² low-power lamp.
5
Full strength after UV irradiation
After complete UV curing, the components are immediately ready for handling. Final strength is achieved immediately after irradiation. For dual-cure products (UV + anaerobic), an additional 24 hours are required for complete anaerobic curing of the shaded areas.
Data sheets & safety data sheet
Full TDS and SDS in DE, EN, FR — view or download directly.
To the documents →

Recommended accessories

Permabond Cleaner A Aerosol
Spray cleaner for the rapid degreasing of bonding surfaces before applying UV adhesive — reliably removes oil, grease and release agents.
View product →
Permabond UV620 — glass standard
Optically clear glass-metal UV adhesive for high-quality glass furniture — the all-rounder of the UV range.
View product →
Permabond UV630 — Biocompatible plastic
UV adhesive for plastics (polycarbonate, acrylic) — biocompatible according to ISO 10993-5, long-wave curing 365–420 nm.
View product →
Permabond UV7141 — Dual-Cure UV+Anaerobic
UV + anaerobic dual curing for shaded areas — ceramic-coated glass, backlit mirrors, overlapping adhesive surfaces.
View product →

Important instructions

Not suitable for / Important notes
Store away from light. Test compatibility with thermoplastic substrates.
storage
Store at 5 to 25 °C and protect from direct sunlight. Curing begins under UV light — keep the bottle in the dark and open only under UV-blocked light.

Which Permabond UV adhesive is suitable for which application?

Permabond UV625 in direct comparison with related products of the UV series.

Permabond UV625
Current product		Permabond UV675 →Permabond UV620 →Permabond UV649 →
ApplicationGlass/metal gel UV adhesive (vertical, gap-filling)Low viscosity clearMedium viscosity clearPlastic-specific, gel
viscosity30,000-55,000 mPa s @ 20 rpm / 120,000-250,000 mPa s @ 2.5 rpm (gel)500–800 mPa·s2,200–2,900 mPa·s20,000–30,000 mPa·s
Substrate strength6–10 N/mm²8–12 N/mm²9–10 N/mm²plastic
Elongation at break>60 %>50 %>80 %>70 %
Topics & Application Areas
Key terms related to this product. Also useful for our search and filters.
UV-curing gel

Technical data for PERMABOND UV625

All 22 product information 5 Performance at final strength 7 Physical properties 5 Curing values ​​2 Mechanical properties 1 Thermal properties 2
Product information
Manufacturer Permabond Engineering Adhesives Ltd
brand Permabond
Container 50 ml, 300 ml, 1 l
Country of origin Italy
UFI (Unique Formula Identifier) F220-301F-3009-J55G
Performance at final strength
Tensile strength (ASTM D-2095-69) 6-10 N/mm2
Tensile strength (ISO37) 16 N/mm2
Refractive index 1490
Elongation at break (elasticity) (ISO37) >60%
Dielectric strength 12 kV/mm
Dielectric constant 1MHz at 25°C 4
Water absorption (ISO62) 2 hours in boiling water <4%
Physical properties
Color colorless
Chemical group Methacrylic acid esters
Viscosity (adhesives) High viscosity >5000 mPas
Viscosity 2.5 rpm 120000-250000
Viscosity 20rpm 30000-55000
Curing values
Curing wavelength 365-400 nm
Final strength 24 hours
Mechanical properties
Hardness (Shore D) 60-70
Thermal properties
Operating temperature (°C) -55 to +80
Storage temperature (°C) 5-25

For binding values, please refer to the technical data sheet (TDS) in the "Documents" tab.

Documents and datasheets

Click on a document for a preview or the download icon for a direct download.

Technical Data Sheets (TDS) 3
Permabond UV625 - Technical Data Sheet DE.pdf
310 KB
Permabond UV625 - Technical Data Sheet EN.pdf
319 KB
Permabond UV625 - Technical Data Sheet FR.pdf
282 KB
Safety Data Sheets (SDS) 3
Permabond UV625 - Safety Data Sheet DE.pdf
483 KB
Permabond UV625 - Safety Data Sheet EN.pdf
479 KB
Permabond UV625 - Fiche de Sécurité FR.pdf
482 KB

Frequently asked questions about Permabond UV625

Practical application and design questions — answered by SILITECH.

Permabond UV625 is a methacrylic acid ester (UV-curing) adhesive with a viscosity of 30,000–55,000 mPa·s @ 20 rpm / 120,000–250,000 mPa·s @ 2.5 rpm (gel). This thixotropic gel UV adhesive is suitable for vertical applications, offers high gap filling, and is impact resistant. The adhesive cures upon irradiation with UV light in the spectral range of 365–400 nm, providing instant curing on demand.

Permabond UV625 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 UV625 typically cures in: 5 s with a 4 mW/cm² low-power lamp; 2 s with a 100 mW/cm² LED lamp; 1 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 UV625 bonds reliably to glass/steel: 6–10 N/mm². For thermoplastic substrates, we recommend testing compatibility before series production — release agents on injection-molded parts can impair adhesion.

Permabond UV625 is a glass/metal gel UV adhesive (vertical, gap-filling) (30,000–55,000 mPa·s @ 20 rpm / 120,000–250,000 mPa·s @ 2.5 rpm (gel) viscosity, >60% elongation at break). Permabond UV675 is crystal clear (500–800 mPa·s, >50% elongation at break) — low viscosity clear.

When stored at 5 to 25 °C and protected from light, Permabond UV625 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 UV625 (glass/metal gel UV adhesive (vertical, gap-filling)); Permabond UV675 (crystal clear); Permabond UV620 (optically clear medium); Permabond UV649 (plastic gel). 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 300 ml or 1 l
Manufacturer Permabond Engineering Adhesives Ltd
brand Permabond
Country of origin Italy
UFI (Unique Formula Identifier) F220-301F-3009-J55G
Performance at final strength
Tensile strength (ASTM D-2095-69) 6-10 N/mm2
Tensile strength (ISO37) 16 N/mm2
Refractive index 1490
Elongation at break (elasticity) (ISO37) >60%
Dielectric strength 12 kV/mm
Dielectric constant 1MHz at 25°C 4
Water absorption (ISO62) 2 hours in boiling water <4%
Physical properties
Color colorless
Chemical group Methacrylic acid esters
Viscosity (adhesives) High viscosity >5000 mPas
Viscosity 2.5 rpm 120000-250000
Viscosity 20rpm 30000-55000
Curing values
Curing wavelength 365-400 nm
Final strength 24 hours
Mechanical properties
Hardness (Shore D) 60-70
Thermal properties
Operating temperature (°C) -55 to +80
Storage temperature (°C) 5-25
Keywords
Keywords
UV-curing gel

Documents and datasheets

Safety Data Sheets (SDS) and Technical Data Sheets (TDS) are available for download: