The Beadsmith Fireline micro-fused braided bead thread, Crystal 4 lb (125 yd) 0.12mm low-stretch

The Beadsmith Fireline by Berkley is a micro-fused, braided Dyneema bead thread that delivers exceptional tensile strength in a slim, 0.12mm diameter line ideal for bead weaving, stringing, and heavy-bead projects.

This micro-fused braided thread was developed from gel-spun polyethylene (Dyneema) and adapted from high-performance fishing line into a go-to choice for jewellery makers. With a translucent crystal colour, 4 lb test rating and 125 yards per spool, Fireline balances durability and discretion: it resists stretching, resists tangles, and passes cleanly through seed beads and delicate findings.

How strong is this thread for beadwork and heavier components?

Fireline’s Dyneema construction gives it a very high strength-to-diameter ratio, so you get durable performance without bulky cord. The 4 lb test provides reliable security for most beadweaving and light to medium-weight beading projects.

• 4 lb tensile rating for everyday beadweaving and stringing
• 0.005" (0.12 mm) diameter slips through small bead holes
• Micro-fused braid resists fraying and abrasion
• Holds knots well when finished properly

Will Fireline work with fine seed beads and multiple passes?

Yes — the small diameter and smooth braided surface make it suitable for multiple passes through seed beads and tight patterns. It doesn’t stretch, so tension stays consistent across long rows and complex weaves.

• Translucent crystal colour reduces visual impact in clear or light beads
• Slim 0.12 mm diameter fits common seed bead holes and needles
• Stable tension for ladder, peyote and right-angle weaves
• Threading a beading needle is straightforward with its flexible braid

How should I cut and finish the ends to avoid fraying?

Sharp scissors will give a clean cut, but because Fireline is a micro-fused braided polyethylene you can also fuse the ends with heat for a sealed finish. Using a dedicated thread burner or a careful touch from a lighter seals the end and prevents splitting or fuzzy fibres.

• Cut with precision scissors for an immediate clean edge
• Use a thread burner or lighter to melt and seal ends safely
• Allow fused end to cool before handling to avoid stickiness
• Practice on a spare length first to master heat finishing

How versatile is this line beyond beadweaving?

Originally created for fishing, Fireline’s strength and low stretch make it useful for many jewellery applications beyond bead weaving. It performs well for stringing heavier beads, attaching pendants, and any situation where thin, tough cord is required.

• Suitable for stringing glass, metal, and stone beads
• Works with crimp beads, knots, and multi-strand constructions
• Resists tangles and retains shape in finished pieces
• Made in the USA to consistent quality standards

Who is this for: The Beadsmith Fireline by Berkley suits hobbyists and professional jewellery makers who need an ultra-strong, slim thread for beadweaving, multi-pass patterns, and projects using heavier beads or findings. It’s particularly helpful when a nearly invisible, abrasion-resistant line is required, and for makers who prefer the option to heat-seal ends for a neat, durable finish. If you value consistent tension, minimal stretch, and a compact 0.12 mm profile, this spool is a practical addition to any beader’s toolkit.