UV Resins in Fly Tying: What You Need to Know

UV Resins in Fly Tying: What You Need to Know

UV Resins in Fly Tying: What You Need to Know

UV resin has become one of the most versatile and game-changing materials in modern fly tying. Whether you’re building bombproof heads on streamers or adding subtle shine to nymphs and emergers, UV resin opens up creative and functional possibilities that traditional head cement or epoxy just can’t match.

What is UV Resin?

UV resin is a liquid that cures (or hardens) almost instantly when exposed to ultraviolet light. Unlike epoxy, which takes time to set and often requires mixing, UV resins are single-part solutions that let you build, shape, and finish flies quickly—no waiting around.

Why Use It?

  • Speed: With a UV light, resin cures in seconds. You can build flies faster and more efficiently.
  • Precision: It stays where you put it—ideal for fine details on small patterns.
  • Durability: Once cured, UV resin is rock-hard and water-resistant, holding up to toothy fish and rough water.
  • Versatility: Use it to coat wing cases, build heads, create bodies, or lock in thread wraps.

Types of UV Resin

Most brands now offer a range of viscosities so you can tailor the resin to your tying style:

  • Thin: Flows like water—great for coating wing cases, nymph backs, or small flies without adding bulk.
  • Medium: A bit more body—good for sculpting small heads or building tapered bodies on mid-sized patterns.
  • Thick: Stays put—perfect for forming heads on streamers, surf candies, or articulated flies where shape matters.

Popular Uses

  • Perdigon Nymphs: Thin resin adds a slick, glassy finish that helps the fly sink faster.
  • Streamers: Thick resin creates solid heads and eyes that won’t crack or peel off after a few strikes.
  • Emergers & Soft Hackles: A dab of medium resin can anchor delicate materials while keeping a slim profile.


Brand Breakdown

There are lots of options out there, but a few brands stand out for quality and consistency:

  • Loon Outdoors: Very beginner-friendly and available in multiple viscosities. Their “Flow,” “Thin,” and “Thick” lineup covers most needs. Non-tacky finish if cured properly.
  • SOLAREZ: Known for super-tough finishes. Also available in different formulas, including Bone Dry (which cures completely tack-free without a top coat).
  • Bug-Bond: Less common in the U.S., but very popular in Europe. Smooth finish, great clarity.

Pro Tips

  • Use a high-quality UV torch: Not all lights are created equal. A good light makes a big difference in curing speed and finish.
  • Apply in layers: Especially with thick resin—build slowly to avoid bubbles and slumping.
  • Check for tack: Some resins can feel a little sticky after curing. Wipe with rubbing alcohol or coat with a thin varnish if needed.

Final Thoughts

If you’re not already using UV resin in your tying, it’s worth a shot. The control, speed, and durability it adds to your flies can really level up your tying—especially for patterns that take a beating or need that extra polished look.

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