It looks like you’re referring to Loon Outdoors UV Clear Fly Finish Flow, a popular fly-tying product. Here’s a quick overview:
Loon UV Clear Fly Finish Flow (2 oz)
– Type: UV-activated, water-thin clear resin for fly tying.

– Uses:
– Creates a durable, glossy finish on flies.
– Penetrates deep into materials (like dubbing or hackle) for a smooth coating.
– Bonds quickly when cured under UV light (requires a UV torch).
– Key Features:
– Thin viscosity for easy application.
– Non-yellowing and flexible when cured.
– Works well for nymphs, emergers, and other small flies where a thin, clear coat is needed.
– Curing: Requires a UV light (365–395 nm) for hardening (usually 10–30 seconds).
Alternatives/Comparisons:
– Loon Thick: For a thicker, more gap-filling finish.
– Solarez Bone Dry: Similar thin UV resin but with a different formula.
– Clear Cure Goo: Another popular UV resin brand.
If you’re using it for delicate patterns (e.g., midges or CDC flies), this is a great choice due to its low viscosity. Just ensure you have a UV light to cure it properly!
Let me know if you’d like tips on application or recommended UV lights!