It looks like you’re referring to Loon UV Clear Fly Finish Flow, a product used in fly tying. Here’s a breakdown of what it is and how it’s typically used:

Loon UV Clear Fly Finish Flow
– Type: UV-activated, water-thin clear resin used for fly tying.
– Purpose: Creates a durable, glossy, and flexible finish on flies when cured under UV light.
– Key Features:
– Water-thin consistency: Flows easily into small crevices, ideal for coating delicate patterns (e.g., midges, emergers).
– Flexible when cured: Resists cracking, even on articulated flies or materials like CDC.
– Fast curing: Hardens in seconds under a UV light (365鈥?95 nm wavelength).
– Crystal clear: Maintains transparency without yellowing over time.

How to Use
1. Apply a thin layer over the fly (e.g., wing posts, thread wraps, or dubbed bodies).
2. Spread evenly with a bodkin or brush (optional: use a toothpick for precision).
3. Cure under a UV light for 10鈥?0 seconds (depending on light intensity).
4. Add additional layers if needed for extra durability.

Best For
– Small dry flies (e.g., Comparaduns, Parachute Adams).
– Emerger patterns (e.g., RS2, WD-40).
– Reinforcing thread wraps or creating “bubble” effects on nymphs.
– Coating CDC feathers without stiffening them excessively.

Tips
– Shake well before use to ensure even consistency.
– Avoid over-application鈥攎ultiple thin layers are better than one thick layer.
– Store in a cool, dark place to prevent premature curing.

Alternatives
– Thicker UV resins (e.g., Solarez Bone Dry, Loon Thick) for bulkier flies.
– Non-UV options (e.g., head cement, epoxy) if UV light isn鈥檛 available.

If you meant something different (e.g., a typo or another product), let me know! Otherwise, hope this helps with your fly-tying projects. 馃幆