Permabond UV625 UV non-drip thick UV gel glue for gap filling and vertical (wall) bonding

Product Name

Permabond UV625 UV Non-Drip Thick UV Gel Glue

Brief Description

Permabond UV625 is a single-part, fast-curing, UV-curable adhesive based on methacrylate ester chemistry. It presents as a clear, gel-like, non-drip formulation, specifically engineered for bonding and sealing glass and metal. Its thick, gel-like viscosity makes it particularly suitable for applications on vertical surfaces and for filling large gaps, while providing a tough, flexible, and impact-resistant bond.

Popular Applications & Uses

- Bonding and sealing glass to metal components.- Bonding glass to glass assemblies.- Effective for gap filling in various applications.- Ideal for vertical surface bonding where a non-drip adhesive is required.- Structural bonding applications requiring high strength and impact resistance.- Assembly of glass furniture and display cases.- Repair and assembly in automotive and marine sectors.

Industries that Commonly Use It

- General Manufacturing- Construction/ Building Services- Metal Fabrication- Furniture- Sign & Display- LED/Electronics- Automotive Service/Repair- Marine- Distributers & Resellers

Special and Unique Features

- **Cure on Demand:** Cures rapidly when exposed to UV light, allowing for precise positioning before hardening.- **Non-Drip Gel Consistency:** Its thick, gel-like viscosity prevents sagging or flowing, making it ideal for vertical and overhead applications.- **Excellent Gap Filling:** Designed to effectively fill large gaps, ensuring a strong and complete bond.- **Flexible and Impact Resistant:** The cured adhesive is tough, flexible, and offers excellent resistance to impact.- **Fast Curing:** Achieves fixture strength quickly, even with low-power UV lamps.- **100% Solids:** Contains no solvents, contributing to a more environmentally friendly profile and reduced shrinkage.

Key Properties

- Chemical Composition: Methacrylate ester.- Appearance: Colourless gel.- Viscosity @ 25°C: 30,000-55,000 mPa.s (cP) at 20 rpm; 120,000-250,000 mPa.s (cP) at 2.5 rpm. (Reported up to 185,000 mPa.s)- Specific Gravity: 1.0.- Typical Fixture Time: As fast as 1-5 seconds, depending on UV lamp power and spectral output.- Cure Wavelength: 365 - 400 nm.- Tensile Strength (steel to glass): 6-10 N/mm² (870-1450 psi).- Tensile Strength (ISO37): 16 N/mm² (2300 psi).- Elongation (ISO37): >60%.- Hardness (ISO868): 60-70 Shore D.- Maximum Gap Fill: Up to 2.5 mm.- Temperature Resistance: Cured adhesive can withstand temperatures from -55°C (-67°F) and higher temperatures for brief periods, such as during paint baking or wave soldering processes.

Surface Compatibility

- Excellent adhesion to metal.- Excellent adhesion to glass.- For thermoplastic surfaces, compatibility tests are recommended.- Surfaces should be clean, dry, and grease-free for optimal bonding.

Known backups / known substitutes

- Other Permabond UV-curable adhesives, such as Permabond UV649 (specifically for plastics).- Other adhesive technologies like epoxies or cyanoacrylates, depending on specific application requirements for cure time, gap fill, and material compatibility.

Comparison Note

Permabond UV625 distinguishes itself from many other adhesives by offering rapid, on-demand UV curing, significantly accelerating production cycles compared to traditional two-part epoxies. Its unique non-drip, thick gel consistency makes it particularly advantageous for vertical applications and filling larger gaps, where lower viscosity UV adhesives or thin cyanoacrylates would be unsuitable due to sagging or insufficient gap-filling capability. Furthermore, it provides a tough, flexible, and impact-resistant bond, which is a key benefit over more rigid adhesive types.