Carbon Fiber Repair Kit

Name: Carbon Fiber Repair Kit
Brand: Boat Suppliers
SKU: SK-CFDIY-S
Price: 68.95 USD
Availability: InStock

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Boat Suppliers

Carbon Fiber Repair Kit

SKU:SK-CFDIY-S

$68.95 USD

$68.95 USD ~~USD~~

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In stock

Quantity

This carbon fiber repair kit has the carbon, epoxy and filler for a small structural repair on a carbon bike frame, hydrofoil, fishing rod, board, panel or boat part. You get 1 yard of 6 inch plain weave 3K carbon tape to rebuild the laminate, a 21.3 oz 3:1 epoxy kit to wet it out, and fumed silica to thicken the epoxy into a gap filler. More carbon and supplies for bigger jobs are in our carbon fiber materials.

Mixing the 3:1 epoxy

Measure by volume in the graduated tubs, three parts resin to one part medium hardener: 3 oz resin with 1 oz hardener for a small batch, up to the full 16 oz with 5.3 oz. Stir 2 minutes, scraping the sides and bottom, then pour into the second tub and stir again. Confirm the ratio printed on the hardener bottle before you mix. At 77°F (25°C) the repair sands in 12 to 18 hours.

Filling gaps

Stir fumed silica into mixed epoxy until it stops running. That paste fills gaps and crushed areas under the carbon, and fairs the weave smooth afterward. Bring your own nitrile gloves, denatured alcohol, 80 grit paper, masking tape, and peel ply or packing tape for a smooth cured face.

Ships in two boxes: the sandpaper comes in its own package.

Plain weave 3K carbon fiber tape, 6 in x 1 yd (36 in)
21.3 oz epoxy: 16 oz resin, 5.3 oz medium 3:1 hardener
Fumed silica, 1 quart
2 graduated pint mixing tubs and 2 chip brushes, 1 in
4 in plastic spreader
Wooden mixing sticks, pack of 50
21 wet/dry sandpaper sheets, 120 to 2000 grit

Specifications

Coverage & Usage

Designed for small structural carbon repairs: bike frames, hydrofoils, rods, boards, auto panels and boat parts.
One kit gives about 2 to 3 layers over a 6 in x 12 in repair, or one layer along the full 36 in.
Epoxy cures at room temperature and sands in 12 to 18 hours at 77°F (25°C).

Performance

Marine-grade thin epoxy with a medium 3:1 hardener.
Plain weave 3K carbon for stiff, strong reinforcement.
Fumed silica thickens the epoxy into a structural paste for gaps and fairing.
Sandpaper from 120 through 2000 grit for finish prep.

Compatibility

Works with carbon fiber, fiberglass, Kevlar and wood.
Epoxy based: not for polyester or vinyl ester laminates.

Shelf Life & Storage

Store resin and hardener sealed in a cool, dry place. Shelf life 12 months unopened.

Includes

6" x 36" Plain Weave 3K Carbon Fiber Tape (FG-CF5706-01)
16 oz Epoxy Resin + 5.3 oz Medium 3:1 Hardener (EPOX-635311)
Fumed Silica Filler, 1 qt (FL-AER010)
4" Plastic Spreader (FT-PS004)
2x 1" Chip Brushes (BR-TA10)
2x Graduated Pint Mixing Tubs (CON-MM016)
Wooden Mixing Sticks, 50 pack (GLV-TD050)
21x Wet/Dry Sandpaper, 120 to 2000 grit (ships separately)

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How to use this kit

6 in plain weave carbon tape, 3:1 epoxy and silica filler for structural carbon repair.

Safety: Epoxy resin and hardener are skin sensitizers: repeated contact can start a permanent allergy, so keep gloves on and wash with soap and water, never solvent. Carbon dust is electrically conductive as well as respirable: wear a dust mask and eye protection, keep it away from electronics and power tool vents, and wipe the area down wet rather than blowing it off.

What is in the kit

1 yd Plain weave 3K carbon fiber tape, 6 in wide (36 in long)the structural repair layers
21.3 oz Two-part epoxy kit16 oz resin plus 5.3 oz medium hardener, 3:1 by volume
1 qt Fumed silica fillerthickens epoxy into a gap-filling paste without adding weight
2 Graduated pint mixing tubs
2 1 in chip brushes
1 4 in plastic spreader
50 Wooden mixing sticks (tongue depressors)
21 Wet/dry sandpaper sheets, 120 through 2000 gritships in its own package

You supply: nitrile gloves, denatured alcohol, 80 grit paper for prep, masking tape, peel ply or packing tape for a smooth cure, a dust mask and eye protection.

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 in the graduated tubs. Off-ratio epoxy never fully cures. Confirm the ratio printed on your hardener bottle.

Stir 2 minutes scraping sides and bottom, then pour into the second tub and stir again before you use it.

The job, start to finish

1

Sand back and taper

Sand the break back to sound laminate with 80 grit and taper the edges well beyond the damage, about 20 times the skin thickness for carbon. Carbon is stiff, so a short taper concentrates load right at the patch edge and cracks again. Wipe with alcohol.

2

Cut on the bias

Cut carbon patches in increasing sizes, smallest first. Tape the cut line before cutting so the weave does not unravel. For a tube or a curve, cut on the 45 degree bias: bias-cut carbon drapes around compound shapes where a straight cut will bridge and wrinkle.

3

Fill gaps

For a hole or a crushed section, stir fumed silica into mixed epoxy until it stops running and fill back to just under the surface. Mix only what you can use in 15 minutes, and lay the carbon over the paste while it is still tacky.

4

Laminate

Brush epoxy on, lay the smallest patch, and stipple it out until the weave turns from grey to deep black, which is how you know it is fully wet. Add each larger patch the same way. Press peel ply or packing tape over the top for a smooth cure that needs less sanding.

5

Fair and clear

Fill the weave with silica-thickened epoxy and block sand 120 through 2000, wet, keeping the block flat. Carbon has zero UV resistance, so finish with a UV-stable clear coat or paint. Uncoated carbon goes chalky and grey within a season outdoors.

Works onStructural repair of carbon parts: bike frames and tubes, hydrofoil masts and wings, rods, panels, boards, drone and RC parts.

Not forAnything safety-critical where failure means injury, such as a bike steerer or a mast, unless a composites professional inspects it.