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PERMABOND UV639

PERMABOND UV639

https://www.silitech.ch/web/image/product.template/1274/image_1920?unique=8ac25b8

UV-curing adhesive for glass/metal/plastic

Highly elastic UV adhesive — over 220% elongation at break, ideal for acrylic, polycarbonate and PETG.

Price on request

  • Manufacturer
  • Brand
  • Container
  • Color
  • Country of origin
  • Chemical group
  • Viscosity (adhesives)
  • Viscosity at 20 rpm
  • Curing Wavelength
  • Operating temperature (°C)
  • Storage Temperature (°C)
  • Tensile strength (ISO37)
  • Elongation at break (elasticity) (ISO37)
  • Hardness (Shore D)
  • Water absorption (ISO62) 2 hrs in boiling water
  • Shear strength polycarbonate
  • Acrylic glass
  • PETG
  • PET
  • UFI (Unique Formula Identifier)

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UV-curing metal, plastic, glass

 
General Terms and Conditions

Shipping usually within 1 to 3 business days
(Availability confirmed after order)

Express logistics. Fast and reliable within Switzerland & Europe

From Swiss stock Dispatch within 24h Batch certificate Invoice 30 days (B2B) Technical advice
Shipping & Delivery

Usually 1 to 3 business days

Availability is confirmed after order receipt.

Express logistics within Switzerland & Europe.

Terms and Conditions →

Product data

HS Code: 3506.9190000

HS Code: 3506.9190000

PERMABOND UV639
PERMABOND UV639
Permabond · Permabond Engineering Adhesives Ltd ·

Permabond UV639 is a highly elastic, highly transparent UV-curing adhesive — specifically for acrylic, polycarbonate and PETG with an exceptional elongation at break of >220%.

With an elongation at break of >220%, UV639 is the most elastic UV adhesive in the Permabond range — values ​​that standard UV adhesives (50–150%) cannot achieve. This flexibility buffers thermal expansion and contraction between different plastics.

The excellent adhesion to acrylic (>6 N/mm² substrate failure), polycarbonate (>8 N/mm² SV) and PETG (>7 N/mm² SV) makes UV639 the first choice for display, shop window and packaging applications with highly transparent plastics.

SPECIAL FEATURE

Highly elastic with over 220% elongation at break — its exceptional flexibility buffers thermal and mechanical stresses between plastics. Highly transparent for invisible bonding, low shrinkage.

Permabond UV639 in figures
>220 %
Elongation at break
35–45
Shore D soft
Highly transparent
Optically clear
Acrylic/PC/PETG
Specialized

What distinguishes Permabond UV639

>220% elongation at break
Highest elasticity in the UV series — buffers stresses.
Highly transparent
Clear adhesive seam — optically invisible.
Low shrinkage
Dimensionally stable — no stresses due to shrinkage.
Multi-Substrate
PC, acrylic, PETG, PET — all with substrate failure.
Long-wavelength UV curing
365–420 nm — UV-stabilized substrates.
Tg 70 °C
Glass transition temperature for thermal stress.

What is Permabond UV639 used for?

Display and advertising
Acrylic display cases, shop windows, showcases.
Packaging industry
PETG adhesive for food and pharmaceutical packaging.
Highly elastic bonding
If standard UV were too brittle.
Polycarbonate components
Protective hoods, machine covers.
Components with thermal expansion
>220% reserve against stresses.

Processing

1
Clean surfaces
Prepare bonding surfaces clean, dry, and free of grease — degrease with isopropanol or acetone. For aluminum/copper, lightly sand to remove the oxide layer. For plastics, check compatibility.
2
Apply adhesive thinly
Apply Permabond UV639 thinly and evenly – directly from the bottle or using a dispensing device. Keep the adhesive protected from light. Avoid air bubbles.
3
Join and align components
Assemble quickly and precisely. For glass bonding, spread the adhesive into a thin film by applying pressure. Do not move components during UV curing.
4
Cure with UV light
Aim the UV lamp at the bond line. Curing time depends on lamp power, wavelength, and light transmission of the components — typically 1–5 seconds with a 30 W/cm² light guide system, or 5–15 seconds with a 4 mW/cm² low-power lamp.
5
Full strength after UV exposure
After complete UV curing, the components are immediately handleable. Final strength is achieved immediately after irradiation. For dual-cure products (UV + anaerobic), allow an additional 24 hours for complete anaerobic curing of shadow areas.
Data Sheets & Safety Data Sheet
Complete TDS and SDS in DE, EN, FR — view or download directly.
To the documents →

Recommended accessories

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

Important Notes

Not suitable for / Important notes
Store away from light. Provisional TDS — test compatibility before series production.
Storage
Store at 5 to 25 °C and protect from direct light exposure. Curing begins under UV light — keep the bottle in the dark and only open under UV-blocked light.

Which Permabond UV adhesive for which application?

Permabond UV639 in direct comparison with related products of the UV series.

Permabond UV639
Current Product		Permabond UV630 →Permabond UV632 →Permabond UV6302 →
ApplicationHighly elastic UV adhesive for acrylic/PETG/PCHarder, biocompatibleUrethane chemistryLow viscosity PC-specific
Viscosity1,300 mPa·s @ 20 rpm250 mPa·s200–400 mPa·s75 mPa·s
Substrate Strength>8 N/mm² (substrate failure)PolycarbonatePolycarbonatePolycarbonate
Elongation at break>220 %110 %>70 %100–150 %
Topics & Application Fields
Key terms related to this product. Also useful for our search and filters.
UV-curing metal, plastic, glass

Technical data for PERMABOND UV639

All 20 product information 5 Performance at final strength 4 Physical properties 4 Curing values ​​1 Mechanical properties 1 Shear strength ISO 4587 in N/mm² 3 Thermal properties 2
Product Information
Manufacturer Permabond Engineering Adhesives Ltd
Brand Permabond
Container 50 ml, 250 ml
Country of origin Italy
UFI (Unique Formula Identifier) RF11-80CY-H00G-Q0FA
Performance at Full Cure
Tensile strength (ISO37) 20 N/mm²
Elongation at break (elasticity) (ISO37) >220%
Water absorption (ISO62) 2 hrs in boiling water 14%
Shear strength polycarbonate >8 N/mm²
Physical Properties
Color colorless
Chemical group Methacrylate ester
Viscosity (adhesives) Medium viscosity 500 - 5000 mPas
Viscosity at 20 rpm 1300
Curing values
Curing Wavelength 365 - 420 nm
Mechanical properties
Hardness (Shore D) 35-45
Shear strength ISO 4587 in N/mm²
Acrylic glass >6 N/mm²
PETG >7 N/mm²
PET >5 N/mm²
Thermal Properties
Operating temperature (°C) -55 to +120
Storage Temperature (°C) 5-25

Please refer to the technical data sheet (TDS) in the "Documents" tab for binding values.

Documents and data sheets

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

Technical Data Sheets (TDS) 3
Permabond UV639 - Technical Data Sheet DE.pdf
308 KB
Permabond UV639 - Technical Data Sheet EN.pdf
319 KB
Permabond UV639 - Fiche Technique FR.pdf
284 KB
Safety Data Sheets (SDS) 3
Permabond UV639 - Safety Data Sheet DE.pdf
480 KB
Permabond UV639 - Safety Data Sheet EN.pdf
475 KB
Permabond UV639 - Fiche de Sécurité FR.pdf
479 KB

Frequently asked questions about Permabond UV639

Practical application and design questions — answered by SILITECH.

Permabond UV639 is a methacrylic acid ester (UV-curing, long-wavelength) adhesive with a viscosity of 1,300 mPa·s @ 20 rpm. This highly elastic UV adhesive offers >220% elongation at break for acrylic, polycarbonate, and PETG. The adhesive cures upon irradiation with UV light in the spectral range of 365–420 nm, providing instantaneous curing "on demand".

Permabond UV639 cures in the spectral range of 365–420 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.

The UV curing of Permabond UV639 depends on the lamp power, wavelength, and light transmittance of the components. Typical curing times range from seconds to a few minutes.

Permabond UV639 reliably bonds: Polycarbonate: >8 N/mm² (substrate failure); Acrylic: >6 N/mm² (SV); PETG: >7 N/mm² (SV); PET: >5 N/mm² (SV). For thermoplastic substrates, we recommend testing compatibility before series production — release agents on injection-molded parts can impair adhesion.

Permabond UV639 is a highly elastic UV adhesive for acrylic/PETG/PC (1,300 mPa·s @ 20 rpm viscosity, >220% elongation at break). Permabond UV630 is a standard biocompatible (250 mPa·s, 110% elongation at break) hardener.

When stored at 5 to 25 °C and protected from light, Permabond UV639 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 UV639 (Highly elastic UV adhesive for acrylic/PETG/PC); Permabond UV630 (Standard biocompatible); Permabond UV632 (Low viscosity urethane); Permabond UV6302 (Polycarbonate wicking). For shaded 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 250 ml
Manufacturer Permabond Engineering Adhesives Ltd
Brand Permabond
Country of origin Italy
UFI (Unique Formula Identifier) RF11-80CY-H00G-Q0FA
Performance at Full Cure
Tensile strength (ISO37) 20 N/mm²
Elongation at break (elasticity) (ISO37) >220%
Water absorption (ISO62) 2 hrs in boiling water 14%
Shear strength polycarbonate >8 N/mm²
Physical Properties
Color colorless
Chemical group Methacrylate ester
Viscosity (adhesives) Medium viscosity 500 - 5000 mPas
Viscosity at 20 rpm 1300
Curing values
Curing Wavelength 365 - 420 nm
Mechanical properties
Hardness (Shore D) 35-45
Shear strength ISO 4587 in N/mm²
Acrylic glass >6 N/mm²
PETG >7 N/mm²
PET >5 N/mm²
Thermal Properties
Operating temperature (°C) -55 to +120
Storage Temperature (°C) 5-25
Keywords
Keywords
UV-curing metal, plastic, glass

Documents and data sheets

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