Paste-like placement control
The non-sag rheology makes it easier to lay down a bead and keep it there.
FLASHBOND product
UV-8509R
One-component UV curable urethane acrylate
Non-sag UV-cure paste for plastics and metals
UV-8509R is a non-sag, fast-curing urethane acrylate paste for engineered plastics and metal substrates. It is formulated for reduced surface tack and requires direct UV exposure during cure.
In plain English
UV-8509R is a soft, non-sag UV paste for plastic and metal bonds that need bead placement control.
Product fit
Why buyers choose this grade
Soft, flexible cure
Shore A 50 hardness and 200% elongation support sealing and flexible joins better than rigid epoxies.
Made for plastics too
It is made for engineered-plastic and metal bonding instead of only glass or ceramic substrates.
Good fit for
- Connector sealing, clamshell bonding, and bead applications on plastics or metals
- Jobs that need a paste instead of a flowing liquid
- Assemblies where reduced surface tack matters for handling after cure
Things to confirm first
- This material needs direct UV exposure; there is no secondary cure mechanism for blocked light areas.
- Its temperature range tops out at 100°C, so it is not meant for hotter electronics.
Datasheet applications
- PET clamshell bonding
- Connector seal
Key features
- Non-sag paste
- UV curable
- Fast cure time
- Reduced surface tack
Recommended substrates
- Metals
- Plastics
Technical data
Material profile at a glance.
Typical values for reference only. Use these material, cured-state, and cure-window values to compare fit before confirming specifications.
Uncured material
| Chemical class | Acrylated urethane |
|---|---|
| Appearance | Clear |
| Specific gravity | 1.05 |
| Viscosity at 25°C | Non-sag paste |
| Solvent content | No nonreactive solvents |
Cured material
| Durometer hardness | Shore A 50 |
|---|---|
| Elongation | 200% |
| Operating temperature | -50°C to 100°C |
Cure overview
| Minimum intensity | 200 mW/cm² |
|---|---|
| Spectral output | 300 to 400 nm |
| Optimum wavelength | 365, 415 nm |
Shelf life and storage
Store between 10°C and 28°C in a cool, dry location. Material is sensitive to UV and visible light.