More forgiving bond line
The cured profile is tough and flexible, with Shore A hardness rather than a hard Shore D epoxy profile.
FLASHBOND product
UV-8601R
UV/LED cure acrylated urethane
Tough, flexible UV/LED bond for mixed substrates
UV-8601R is a low viscosity, light curing acrylic adhesive that bonds well to a wide variety of substrates and cures to a tough, flexible bond with excellent vibration and impact resistance. Cures at 365 or 405 nm.
In plain English
UV-8601R is the flexible UV/LED option for bonds that need vibration or impact tolerance beyond a rigid cationic epoxy.
Product fit
Why buyers choose this grade
Broad substrate range
It bonds metals, ceramics, glass, and plastics, which helps when the design is not all one material.
Quick LED-friendly cure
It is already tuned for common 365 and 405 nm LED setups with a 4 to 6 second optimal cure window.
Good fit for
- Mixed-substrate bonds where movement or vibration can crack a brittle adhesive
- Flexible seals, light encapsulation, and electronics that need shock tolerance
- Programs using 365 or 405 nm LED cure equipment
Things to confirm first
- If the design needs maximum rigidity, highest Tg, or 200°C-plus performance, a cationic epoxy grade is a better first look.
- Flexible chemistry is great for shock loading, but it is not the same answer as a filled encapsulant for chip protection.
Datasheet applications
- Electronics
- Encapsulation
- Sealant
Key features
- RoHS and REACH compliant
- Tough and flexible bond
- High bond strength
- Fast UV/LED cure
Recommended substrates
- Metals
- Ceramics
- Glass
- Plastics
Packaging
- Syringes
- Bulk
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 | Urethane acrylate |
|---|---|
| Appearance | Clear liquid |
| Odor | Mild to none |
| Viscosity at 25°C | 5,000 to 8,000 cps |
| Specific gravity | 1.15 |
Cured material
| Glass transition (Tg) | 20°C |
|---|---|
| Hardness | Shore A 70 |
| Tensile modulus | 4.3 MPa |
| Water absorption (24 hr) | 1.11% |
| Operating temperature | -55°C to 150°C |
| Volume resistivity | 1 x 10¹² Ω-cm |
Cure overview
| Wavelength | 365 nm, 405 nm |
|---|---|
| Intensity | 250 mW/cm² |
| Optimal cure time | 4 to 6 seconds |
Shelf life and storage
20°C to 25°C, 1 year from date of manufacture. Material is light sensitive.