Permabond UV649 clear transparent UV glue thick gel, non-sag, non-drip vertical and wall glue

Product Name

Permabond UV649 clear transparent UV glue thick gel, non-sag, non-drip vertical and wall glue

Brief Description

Permabond UV649 is a single-part, fast-curing, clear, thixotropic UV-curable adhesive designed for high-strength bonding of plastics, metals, and glass. It is particularly suitable for vertical applications and bonding dissimilar substrates due to its non-sag properties and excellent elongation.

Popular Applications & Uses

- Edge bonding in electronics manufacturing- Encapsulating and strain relief for electronic components- Bonding components, wire tacking, and display assembly in electronics- Assembling and bonding disposable medical components such as syringes, catheters, and tubing- Sealing headlights and bonding glass in automotive applications- Assembling interior and exterior automotive parts- Windshield repairs- Bonding glass for furniture, decorative pieces, and displays- General bonding of various plastics, metals, and glass- Use as a sealant- Jewelry and crafts

Industries that Commonly Use It

- Automotive Service/Repair- Fabrication (Plastic, Metal)- Furniture- General Manufacturing- LED/Electronics- Medical Device/ Prosthetics- Metal Fabrication- Plastic Fabrication- Sign & Display- Transportation/ Specialty Vehicle- Artist, Artisan

Special and Unique Features

- Cures on demand when exposed to UV light- Non-sag, non-drip, thixotropic gel consistency, making it ideal for vertical and wall applications- Clear and colorless appearance, allowing for good depth of cure capabilities- 100% solids, solvent-free formulation with minimal odor- High elongation (greater than 70%), enabling it to absorb stresses related to differential coefficients of thermal expansion- Reworkable by heating the adhesive over 100°C- Fast curing with low-power UV lamps- Provides excellent adhesion to a variety of plastics, metals, and glass

Key Properties

- Chemical composition: Methacrylate ester- Appearance: Colourless, clear- Viscosity @ 25°C: 20,000-30,000 mPa.s (cP) at 20rpm; 80,000-150,000 mPa.s (cP) at 2.5rpm (thick gel)- Specific gravity: 1.1- Typical fixture time: As fast as 2-10 seconds depending on UV lamp power and substrate characteristics- Cure wavelength: 365 - 420 nm- Overlap shear strength (ISO4587): >7 N/mm² (Polycarbonate), >5 N/mm² (PVC), >7 N/mm² (PC to ABS), >1.5 N/mm² (Acrylic)- Tensile strength (ISO37): 15 N/mm² (2200 psi)- Elongation at break (ISO37): >70%- Hardness (ISO868): 50-65 Shore D- Temperature resistance: -55°C to +120°C (can withstand brief periods at higher temperatures like paint baking and wave soldering)- Maximum gap fill: 0.5 mm- Dielectric strength: 25-30 KV/mm- Dielectric constant 1MHz@25°C: 4- Water absorption (ISO62) 2 hours in boiling water: <5%

Surface Compatibility

- Plastics (e.g., polycarbonate, PVC, ABS, acrylic)- Metals (e.g., aluminum, copper, mild steel, stainless steel, brass, zinc)- Glass- Surfaces should be clean, dry, and grease-free before application. Light abrasion may be beneficial for some metals to remove oxide layers.

Known backups / known substitutes

- Other Permabond UV-curable adhesives, such as UV610, UV625, UV6160, UV6231 (for glass bonding), UV7141 (dual cure for shadow areas), or UV643 (for rigid plastics)- Cyanoacrylate adhesives (instant adhesives) for very fast bonding, though they may offer less flexibility or weather resistance- Epoxy adhesives, which provide higher mechanical strength and thermal resistance, and can be formulated as food-grade, but typically have slower cure times- Structural Acrylic (MMA) adhesives, offering strong structural bonds, but may result in a slight amber tint- Urethane adhesives, known for high clarity and flexibility in non-structural applications- Solvent cements, used for chemically welding acrylic, but generally not recommended for polycarbonate

Comparison Note

Permabond UV649 distinguishes itself among UV adhesives due to its high viscosity, non-sag properties, and exceptional elongation, making it particularly well-suited for vertical applications and bonding dissimilar materials where stress absorption is crucial. Its UV-cure mechanism provides on-demand curing, allowing for precise component alignment before rapid solidification, and consistently yields a crystal-clear bond line.