Better gap control
The 15,000 to 25,000 cps filled system is much easier to place than a low-viscosity wetting grade.
FLASHBOND product
UV-3700F
UV cure cationic epoxy, filled
Filled, low-shrinkage UV epoxy for high-temperature service
UV-3700F is a filled, low-shrinkage light cure epoxy with low CTE and high bond strength. It cures to a high-Tg rigid polymer for metals, ceramics, and glass where a low-viscosity system is not the best starting point.
In plain English
UV-3700F is a filled epoxy for better gap control and higher-temperature service than low-viscosity wetting grades.
Product fit
Why buyers choose this grade
Hotter-service candidate
Its listed operating range reaches 250°C, which makes it one of the stronger picks for elevated-temperature duty.
Lower movement after cure
The filled chemistry is built for low shrinkage and low CTE, which supports more dimensionally stable bonds.
Good fit for
- High-temperature electronics or industrial bonds where the adhesive should stay put
- Encapsulation and sealing jobs that need lower shrinkage and more body
- Metal, ceramic, and glass builds where rigid cured properties are the goal
Things to confirm first
- Filled materials usually trade some wetting ease for body, so do not assume it will flow into very tight gaps on its own.
- If optical clarity matters, this off-white filled grade is the wrong starting point.
Datasheet applications
- Electronics
- Encapsulation
- Sealant
Key features
- RoHS and REACH compliant
- Chemical resistance
- High bond strength
- Fast UV cure
Recommended substrates
- Metals
- Ceramics
- Glass
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 | Cationic epoxy |
|---|---|
| Appearance | Off white |
| Viscosity (20 RPM at 25°C) | 15,000 to 25,000 cps |
| Specific gravity | 1.50 |
Cured material
| Glass transition (Tg) | 138°C |
|---|---|
| Hardness | Shore D 80 |
| Ultimate tensile strength | 4,000 PSI |
| Elongation at break | 1 to 3% |
| Operating temperature | -55°C to 250°C |
| Volume resistivity | 1 x 10¹⁴ Ω-cm |
Cure overview
| Wavelength | 365, 405 nm |
|---|---|
| Intensity | 100 to 300 mW/cm² |
Shelf life and storage
23°C ± 10°C, 1 year from DOM. Material is light sensitive.