Permabond UV648 UV glue thick slow-flow gap filling clear transparent plastic bonding

Product Name

Permabond UV648 UV Glue Thick Slow-Flow Gap Filling Clear Transparent Plastic Bonding

Brief Description

Permabond UV648 is a single-part, high-viscosity, UV-curing adhesive formulated primarily for bonding plastics, including acrylic and UV-stabilized plastics. It also provides strong adhesion to glass, metals, and other materials. This urethane methacrylate-based adhesive cures rapidly upon exposure to UV light, forming a clear, colorless, and aesthetically pleasing bond, making it ideal for applications where appearance is critical.

Popular Applications & Uses

- Bonding clear acrylic and polycarbonate in signage, shields, retail displays, and protective enclosures.- Assembly of glass furniture and display cases.- General bonding applications in manufacturing.- Bonding various plastics to themselves or to dissimilar materials like glass and metals.- Gap filling applications due to its thick, slow-flow nature.- Applications requiring an optically clear and colorless bond.

Industries that Commonly Use It

- General Manufacturing- Plastic Fabrication- LED/Electronics- Medical Device/Prosthetics- Transportation/ Specialty Vehicle- Furniture- Sign & Display- Artist, Artisan- Distributers & Resellers

Special and Unique Features

- Cure on demand, allowing for precise alignment of components before bonding.- Non-drip, high-viscosity formulation suitable for gap filling.- Fast curing with low-power UV lamps.- 100% solids, meaning no solvents are present.- Cures to a clear, colorless bond, vital for aesthetic applications.- Excellent adhesion to a wide range of plastics, including acrylic and UV-stabilized plastics.- Contains a long-wavelength photoinitiator for curing through UV-stabilized plastics.

Key Properties

- Chemical composition: Urethane methacrylate.- Appearance: Colourless, clear.- Viscosity @ 25°C: 20rpm: 20,000-40,000 mPa.s (cP); 2.5rpm: 120,000-180,000 mPa.s (cP).- Specific gravity: 1.1.- Hardness (ISO868): 50-65 Shore D.- Tensile strength (ISO37): 11 N/mm² (1600 psi).- Elongation at break (ISO37): >70% to 100%.- Refractive index: 1.490.- Dielectric strength: 25-30 KV/mm.- Dielectric constant 1MHz@25°C: 4.- Water absorption (ISO62) 2 hours in boiling water: <3.5%.- Operating temperature range: -55°C to +120°C.- Maximum gap fill: 2.5 mm.

Surface Compatibility

- Plastics: Excellent adhesion to acrylic, polycarbonate (PC), PET, PVC, ABS, TPU, and other UV-stabilized plastics.- Glass: Excellent for bonding glass to glass or glass to metal.- Metals: Can be used to bond metals, including aluminum and mild steel.- Other materials: Can also bond to ceramics.- Surfaces should be clean, dry, and grease-free before application.

Known backups / known substitutes

- Other Permabond UV-curable adhesives (e.g., Permabond UV643, Permabond UV670).- Cyanoacrylates (instant adhesives).- Epoxies.- Structural acrylics (e.g., Permabond TA46XX series).- Solvent cements (for clear plastics).- Dual-cure UV adhesives for opaque plastics or shadowed areas.- ZDS Adhesive UV glues for plastic bonding (e.g., ZDS3206-1, ZDS3226, ZDS3311F, ZDS3333B).- Gluditec UV glues for plastic bonding (e.g., UV5133, UV5105, UV5135).

Comparison Note

Permabond UV648 offers a unique combination of high viscosity for gap filling, slow flow for precise application, and fast UV curing, making it particularly suitable for clear plastic bonding where aesthetic appearance and rapid assembly are crucial. Its ability to cure through UV-stabilized plastics with long-wavelength photoinitiators differentiates it from some other UV adhesives. While other adhesive types like cyanoacrylates, epoxies, and structural acrylics can also bond plastics, UV648's "cure on demand" feature, solvent-free composition, and crystal-clear finish provide distinct advantages for specific manufacturing and assembly processes.