Seracor

Mettler Seracor is a polyester overlocking thread, sold on 2500m and 1000m spools, built for serging and overlocking work where you need a thread that runs smoothly through high-speed loopers. It comes in a wide range of named colours, from basics like White, Black, Navy and Eggshell through to shades such as Ash Mist, Cobblestone, Summer Sky, Oak Flakes and Pimento.

Pick the 2500m spool if you're overlocking long production runs or want fewer thread changes, and the 1000m spool for shorter jobs or where you need a wider colour choice on hand. Match the thread colour to your fabric or seam finish, keeping in mind overlocking thread is usually chosen a shade close to the main fabric colour since it sits on seam edges rather than the visible face.

We ship same or next business day and offer a price-beat guarantee, so you can stock up on the colours and spool sizes you use most without waiting around.

Frequently asked questions

What's the difference between the 2500m and 1000m spools?

They're the same Seracor thread, just different spool lengths. The 2500m spool suits longer or repeated overlocking jobs, while the 1000m spool is handy if you want more colours without buying as much of each.

Is Seracor thread suitable for sewing as well as overlocking?

Seracor is designed specifically for overlocking and serger work, where its finish helps it feed smoothly through loopers at speed.

How do I choose a colour if I can't find an exact match?

Since overlocking thread mostly sits on seam edges, choosing a shade close to your fabric colour, like Ash Mist or Stone for neutrals, usually blends in well.