Scientific Anglers Sonar Stillwater Seamless Density Sink 5 / Sink 7 Fly Line
The Scientific Anglers Sonar Stillwater Seamless Density Sink 5 / Sink 7 is the fastest sinking line in the Stillwater Seamless Density range, designed for getting flies down quickly and fishing close to the bottom. A Sink 5 running line transitions seamlessly into a Sink 7 head, creating a fast, controlled descent while maintaining direct contact with your flies.
- Sink 5 / Sink 7 blended-density sinking line
- Fastest sinking line in the Stillwater Seamless Density range
- Designed for fishing deep and dredging the bottom
- Seamless Density technology for a smooth transition between sink rates
- Helps eliminate hinging and maintain direct contact with flies
| Specification | Value |
|---|---|
| Line Type | Seamless Density Sink 5 / Sink 7 |
| Application | Deep water fishing, bottom dredging |
| Transition Design | Smooth blend from Sink 5 to Sink 7 |
| Key Feature | Fast, controlled descent with direct fly contact |
FAQ
What is the main advantage of the Seamless Density technology?
The Seamless Density technology provides a smooth transition between sink rates, allowing for a fast and controlled descent from Sink 5 to Sink 7 without hinging or losing contact with the fly.
Is this line suitable for deep water fishing?
Yes, this line is specifically designed for deep water fishing and bottom dredging due to its fast sinking rate and direct fly contact.
Does the line maintain fly contact during descent?
Yes, the design helps eliminate hinging and maintains direct contact with the fly throughout the descent.


Austin Peters –
This line gets flies down quickly and stays on target. The transition from Sink 5 to Sink 7 feels smooth and natural. I’ve used it in deep water and it performs well when fishing near the bottom.
Brandon Taylor –
Great for bottom fishing. The seamless sink rate keeps the fly from hinging, which makes a big difference in accuracy. I noticed a clear drop in the water and better hook-ups.
Brandon Quinn –
Felt faster than other sinking lines I’ve tried. The transition between sink rates is smooth, though it might be a bit stiffer in cold water. Still, it works well for deep water applications.
Amanda Kerr –
Used it during a late-season trip in a deep lake. The line delivered consistent performance and kept the flies in contact with the bottom. Very reliable for dredging.