Permabond UV6302 Low-Viscosity UV Adhesive for Fast Plastic Bonding
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Permabond UV6302 is a single-part, fast-setting UV-curable adhesive developed specifically for bonding plastics. It combines very low viscosity with strong adhesion to materials such as polycarbonate, rigid PVC and PMMA, making it especially useful for close-fitting assemblies where the adhesive needs to wick into a tight joint by capillary action.
UV6302 cures on demand when the adhesive line is exposed to a compatible light source in its documented 365–420 nm cure range. Under the TDS test conditions, it can reach fixture strength in seconds, helping speed assembly while giving operators control over when cure begins.
Key Features & Benefits
- Designed for plastic bonding: documented performance on polycarbonate, rigid PVC and PMMA.
- Low-viscosity capillary action: 50–100 mPa·s (cP) at 25°C for close-fitting joints and post-assembly application.
- Cure on demand: light cure allows positioning before exposure.
- Fast fixture: documented fixture times of 4–30 seconds depending on substrate under a low-power 3–5 mW/cm² lamp.
- High bond strength: polycarbonate shear strength greater than 7 N/mm² (greater than 1,000 psi) under the stated ISO 4587 test.
- 100% solids, no solvents: as stated in the product TDS.
- Clear, colorless appearance: suited to assemblies where a low-visibility bond line is desirable.
Performance Characteristics / Product Specifications
| Chemistry | Methacrylate ester |
| Components | 1 part |
| Appearance | Clear, colorless |
| Viscosity | 50–100 mPa·s (cP) at 25°C; SDS also reports approximately 75 mPa·s at 23°C |
| Specific / relative density | 1.10 (approximately 1.10 g/mL) |
| Joint gap | Designed for close-fitting components with tight gaps; no numeric maximum gap is stated in the TDS |
| Cure wavelength | 365–420 nm |
| Fixture time — low-power 3–5 mW/cm² lamp | Polycarbonate: 25–30 sec; rigid PVC: 5–7 sec; PMMA: 4–5 sec |
| Full cure | No single fixed full-cure time is stated. Parts should remain firmly held while the joint is exposed for the appropriate time to ensure full cure; actual cure depends on lamp power, spectral output, distance and substrate light transmission. |
| Shear strength — ISO 4587 | Polycarbonate: >7 N/mm² (>1,000 psi); rigid PVC: >2 N/mm² (>300 psi); PMMA: 1.5–2 N/mm² (200–300 psi) |
| Tensile strength — DIN 53504 | 15–20 N/mm² (about 2,200 psi) |
| Elongation — DIN 53504 | 100–150% |
| Hardness — ISO 868 | 50–65 Shore D |
| Refractive index | 1.474 |
| Temperature performance | Cured adhesive may be exposed down to -55°C (-67°F), depending on the bonded materials. The TDS notes that higher temperatures can be tolerated for brief periods when the joint is not unduly stressed; it does not state a maximum continuous service-temperature rating. |
| Package size | 50 mL (about 1.69 fl oz) |
Light Source & Cure Considerations
The curing light must reach the adhesive line. The TDS specifies a cure wavelength of 365–420 nm and reports the fixture times above using a low-power handheld lamp at 3–5 mW/cm². Industrial UV lamps may cure faster. LED UV lamps have a narrow spectral output, so the LED peak wavelength must be appropriately matched to the adhesive photoinitiator; do not assume that any UV lamp will produce the same cure.
Directions for Use
- Make sure bonding surfaces are clean, dry and grease-free. Isopropanol can be used to degrease most surfaces. Remove silicone-based cleaning residues. Aluminum, copper and copper alloys may benefit from light abrasion to remove oxide.
- When bonding thermoplastics, test compatibility first; mold-release agents can reduce bond strength.
- Apply directly from the bottle or with suitable automated dispensing equipment. Minimize exposure of the uncured adhesive to ambient light.
- Assemble the parts while avoiding trapped air in the joint, then hold the parts firmly without movement.
- Expose the adhesive line to a compatible 365–420 nm light source for sufficient time to achieve the required cure. Cure time varies with light intensity, spectral output, distance and the transmission characteristics of the substrates.
Storage & Handling
Protect the liquid adhesive from room lighting and direct sunlight, and keep the container tightly closed when not in use. The TDS lists storage at 5–25°C (41–77°F), while the SDS specifies storage in the closed original container at 44–77°F (approximately 7–25°C). Do not return unused material to the storage container.
Safety: Review the SDS before use. The uncured product is classified as a corrosive material and can cause severe skin burns and eye damage. Avoid skin and eye contact, use adequate ventilation, and wear suitable protective gloves, protective clothing and eye/face protection.