The SA (Scientific Anglers) WetCel Sink Tip Fly Line – Type IV is a specialized sinking fly line designed for various fishing scenarios where a controlled, fast-sinking tip is beneficial. Here’s a breakdown of its key features and typical uses:
Key Features:
1. Sink Rate:
– Type IV indicates a fast-sinking line, typically sinking at around 4 inches per second (IPS).
– The sink tip (usually 10–15 feet) allows for deep presentations while keeping the rest of the line manageable.
2. Construction:
– Features a floating running line with a sinking tip section, offering versatility in depth control.
– The WetCel technology ensures a smooth, consistent sink rate.
3. Ideal Uses:
– Streamer Fishing: Great for getting streamers down quickly in deep pools or fast currents.
– Stillwater Fishing: Effective for targeting trout, bass, or pike holding at intermediate depths.
– Saltwater Applications: Useful for striped bass, redfish, or other species in deeper water.
4. Line Weight & Length:
– Available in standard fly line weights (e.g., 6wt–10wt).

– Sink tip length varies (commonly 10–15 ft), with a total line length of ~90 ft.
When to Use It?
– When fish are holding deeper than 5–10 feet.
– In strong currents where a fast sink rate is needed to reach the strike zone.
– For aggressive retrieves with weighted or unweighted streamers.
Alternatives & Considerations:
– Type III (3 IPS) or Type V (5 IPS): Choose based on desired sink speed.
– Full Sinking Lines: If fishing very deep (e.g., lakes with 20+ ft depths).
– Versatility: The sink-tip design allows easier mending and line control compared to full sinking lines.
Would you like recommendations on leader setups or techniques for this line?