SKU:SK-CF003
20 in stock
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This carbon fiber repair kit is perfect for restoring carbon fiber surfboards, hydrofoils, bikes, fishing rods, boats and other composite equipment. It includes our durable epoxy resin system and carbon fiber fabric for strong, long-lasting reinforcement. All materials are also available individually and in larger quantities if you need additional supplies.
- 1 LB Chopped Carbon Fiber 1/2"
- 16oz Epoxy Resin
- 5.3oz Medium Epoxy Hardener
If you need a different weave size or pattern, we can curate any package for your repair. Contact us for more details.
Specifications
How to use this kit
Chopped carbon and epoxy for marbled forged carbon parts. Every kit ships with this same sheet printed and in the box.
What is in the kit
- 1 lb Chopped carbon fiber, 1/2 inthe marbled forged carbon look, no weave to line up
- 21.3 oz Two-part epoxy kit16 oz resin plus 5.3 oz hardener, 3:1 by volume
You supply: a mold or the part being covered, mold release or PVA, mixing cups and sticks, gloves, a dust mask, and clamps or a vacuum bag if you have one.
Mixing epoxy (3:1 by volume)
| Ratio | 3 parts resin to 1 part hardener |
| Small batch | 3 oz resin + 1 oz hardener |
| Full kit | 16 oz resin + 5.3 oz hardener |
Measure by volume. Off-ratio epoxy never fully cures. Confirm the ratio printed on your hardener bottle.
Forged carbon runs roughly equal parts chopped fiber to mixed epoxy by volume. Wetter flows into detail, drier shows more fiber.
The job, start to finish
Prep the mold
Forged carbon is molded, not laid up, so you need a mold or a part to press against. Wax and release it thoroughly, or use PVA. Anything you miss will bond permanently, and chopped carbon plus epoxy grips a mold hard.
Mix the epoxy
Mix 3 to 1 by volume, stirring 2 minutes and scraping the sides, then re-pot and stir again. Mix only what the part needs: a deep pot of epoxy heats up on its own and can smoke, and forged carbon parts are thick by nature.
Fold in the fiber
Add chopped carbon to the epoxy and fold until every fiber is wet and the mass looks like black modeling clay. Roughly equal parts by volume is the starting point. Wetter flows into detail; drier shows more fiber and less resin shine.
Pack the mold
Press the mixture into the mold in small handfuls, working it firmly into corners and detail so you do not leave voids. Overfill slightly, then clamp, press or bag it. Pressure is what gives forged carbon its density and the marbled look.
Demold and finish
Leave it a full 24 hours, longer if cool, before demolding. Sand through the grits, then clear coat: the marbled pattern only pops once there is gloss over it. Carbon has no UV resistance, so use a UV-stable clear.
If something goes wrong
Mix looks dry and crumbly
Not enough epoxy. Add a little at a time until every fiber is wet and it packs like clay.
Part stuck in the mold
Under-released. Wax several coats or use PVA over the wax.
It got hot and smoked
The pot was too deep. Mix smaller batches and pour promptly.
Voids at the edges
Not packed hard enough into detail. Work small handfuls into corners first.
Pattern looks flat and dull
It needs clear coat. Forged carbon only shows its marbling under gloss.
No mold, release or tools are included: this kit is the two materials. Cloth, release agents and clear coats are all at boatsuppliers.com.
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