Semperfli Nano Silk Saltwater 100D
Semperfli is known for its Nano Silk, offering 100m per spool with the highest strength per denier. This version is specially developed for saltwater fly tying at 100D. The thread features a deep, dope-dyed GSP formulation, where color is introduced during the raw GSP dyeing and extrusion process, ensuring it will not lighten or run.
Designed for streamer and predator patterns, Nano Silk Saltwater 100D has a flat profile ideal for chironomids, traditional flies, and ribbing. It is finer than many standard polyester 6/0 threads and offers exceptional strength and durability in saltwater environments.
| Specification | Value |
|---|---|
| Density | 100D |
| Material | GSP (Glass Strand Polyethylene) |
| Color | Black (deep, dope-dyed) |
| Length per spool | 100m |
| Application | Streamer, predator patterns, chironomids, ribbing |
FAQ
What makes the color of Nano Silk Saltwater 100D different from other silk threads?
The color is achieved through dope dyeing during the extrusion process, which embeds the color directly into the GSP fiber. This ensures the thread does not fade or run when exposed to saltwater or sunlight.
Is Nano Silk Saltwater 100D suitable for use in saltwater fly tying?
Yes, it is specifically designed for saltwater fly tying with a flat profile and high strength, making it ideal for streamers, predators, and chironomids.
How does its strength compare to standard polyester threads?
Nano Silk Saltwater 100D has a higher strength per denier than standard polyester 6/0 threads, offering superior durability in demanding saltwater conditions.



Sebastian Anderson –
Used this thread for a series of saltwater streamers and found it to be incredibly strong and consistent. The color stays true even after prolonged exposure to seawater. Great for chironomid patterns where a flat profile is needed.
Anthony Wilkins –
The thread holds up well in both tying and casting. It’s finer than regular polyester and doesn’t fray easily. The deep black color is vibrant and doesn’t fade after several weeks in the water.
Carolyn Tucker –
Solid performance in predator patterns. A bit more expensive than standard threads, but the durability and color retention justify the price. Works well with ribbing and traditional designs.