sales@foscoconnect.com
(510) 319-9878
Silicon Valley, CA, USA
Overview
TRA-BOND F123 is a high-performance, two-component epoxy adhesive formulated for rapid curing in fiber optic termination applications. Designed with low viscosity for excellent wicking, it is ideal for bonding fiber optic bundles, potting glass fibers, and terminating single or multi-channel connectors.
This epoxy features a unique three-step color-change indicator system to verify proper mixing and curing. The components transition from light yellow (unmixed) to light green (mixed) and finally to a deep reddish-amber upon completion of the heat cure. The formulation provides robust, mechanically stable bonds across diverse materials including metals, ceramics, glass, and various plastics, offering resistance to moisture, weathering, and common chemicals.
Key Features
-
Color-Change Indicator
Features a three-step color transition (yellow-to-green-to-amber) that provides visual confirmation of proper mixing and curing status. -
Rapid Heat Cure
Engineered for efficient high-temperature curing, significantly reducing assembly cycle times compared to room-temperature adhesives. -
Low Viscosity
Allows for superior wicking capabilities, ensuring optimal penetration into fiber bundles and tight-tolerance connector ferrules. -
Thermal Stability
Maintains mechanical integrity under high temperatures and demonstrates high resistance to thermal shock. -
Chemical Resistance
Offers durable protection against water, weathering, gases, vapors, and common industrial petroleum products. -
Low Stress Bonding
Formulated to minimize internal stress during cure, preventing piston effect in fiber optic connectors during thermal cycling.
Applications
- Fiber optic bundle bonding
- Potting glass fibers
- Terminating single and multi-channel fiber optic connectors
- Optical component assembly
Technical Specifications
| Specification | Value |
|---|---|
| Product | TRA-BOND F123 |
| Package Size | 2.5 Grams |
| Cure Temperature | 100°C (Required) |
| Typical Cure Time | 1-5 Minutes (Depending on temp) |
| Color Change Sequence | Yellow (Unmixed) -> Green (Mixed) -> Reddish-Amber (Cured) |
Frequently Asked Questions
What is the required curing temperature for this epoxy?
The adhesive requires a 100°C high-temperature cure to achieve its final color and mechanical properties.
Does the color change indicate the cure is finished?
Yes, the transition to deep reddish-amber indicates that the required high-temperature cure process is complete.
Can I use this for connectorization?
Yes, it is specifically designed for potting and terminating both single and multi-channel fiber optic connectors.
Is this epoxy resistant to chemicals?
It exhibits excellent resistance to water, weathering, petroleum products, and a wide range of organic and inorganic environments.
What should I do if the application temperature exceeds 150°C?
An additional post-cure of 30 minutes at 150°C is recommended for applications where service temperatures higher than 150°C are expected.

