Chopped Carbon Fiber

2 products

  • 1/2" Chopped Carbon Fiber1/2" Chopped Carbon Fiber - image 2
    Boat Suppliers

    1/2" Chopped Carbon Fiber

    Loose 1/2 in chopped carbon strand for mixing into resin. The long fiber is what does the work:...
    $17.95 USD
    $17.95 USD
    $35.90 lb
    Sold out

    Weight
  • 1/4" Chopped Carbon Fiber1/4" Chopped Carbon Fiber - image 2
    Boat Suppliers

    1/4" Chopped Carbon Fiber

    Loose 1/4 in chopped carbon strand, mixed into resin where cloth will not fit. Stir it into epoxy,...
    $17.95 USD
    $17.95 USD
    $35.90 lb
    Sold out
    Weight

Chopped Carbon Fiber

Chopped strand for forged carbon

Chopped carbon strand does two things. Blended into epoxy it gives you a dark, high strength thickened adhesive or filler for bonds where color matters and you do not want the chalky look of a glass filled mix. Packed into a mold with resin, it produces forged carbon parts with the marbled pattern that woven fabric cannot give you.

Length is the variable. The 1/4 inch flows and levels better in a filler mix and is easier to work into a corner. The 1/2 inch carries more strength across a bond line but stiffens the paste. Both come in 0.5, 1 and 2 pound tubs. Carbon is conductive and galvanically active against aluminum, so isolate it from aluminum hardware.

Chopped carbon fiber is added to epoxy, polyester, or vinyl ester resin to boost strength and stiffness without the bulk of woven fabric. Shops use it for reinforcing fillets and bond lines, casting small structural parts, and molded forged-carbon parts where you want the carbon look and high strength in a flowable mix. It is reinforcement, not a fairing filler.

Yes. Chopped carbon fiber works with epoxy, polyester, and vinyl ester resin. Epoxy is the usual choice for structural carbon work because it bonds better and is less brittle. Stir the fiber into mixed resin to the consistency you need, then wet it out fully so there are no dry fibers left in the layup.

Shorter 1/4 inch fiber blends smoother and works into tight fillets and thin sections more easily, giving a cleaner finish. Longer 1/2 inch fiber carries more load and adds more crack resistance, so reach for it where structural reinforcement matters more than surface smoothness. Many shops keep both and pick by the job.

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