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12.3oz Plain Weave Carbon Fiber Tape (12K)

12.3oz Plain Weave Carbon Fiber Tape (12K)

SKU:FG-CF12303-01

Regular price $8.34 USD
Sale price $8.34 USD Regular price
Unit price $8.34  per  yd
Sale Sold out
Shipping calculated at checkout.

1049 in stock

Width: 3"
Length: 1 Yard
Order several sizes at once width by length, one add to cart
Width1 Yard3 Yards10 YardsFull Roll (100 Yards)
3"
4"
6"
10"outout
12"
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Our 12.3 oz Plain Weave Carbon Fiber Tape is built for demanding reinforcement applications where maximum strength and durability are essential. Woven from large 12K tows in a balanced over-under plain weave pattern, this heavy-duty tape allows for rapid laminate buildup and exceptional rigidity. Perfect for marine, aerospace, and structural composite projects, it provides superior load-bearing capability while maintaining dimensional stability during layup.

Specs

Fiber 12K carbon, plain weave
Weight 12.3 oz/yd² (417 gsm)
Thickness approx 0.018 in (0.46 mm) per ply
Widths 3, 4, 6, 10 and 12 in
Lengths 1, 3 and 10 yd cuts, 100 yd full roll
Resin epoxy, polyester, vinyl ester

This is the heavy tape of the three: more than twice the weight of the 5.7 oz 3K tape, with strength in both directions from the plain weave, so a stringer wrap or repair band builds thickness in fewer plies. Pick it for structural bands on hulls, stringers, transom knees and beams where the coarse 12K face will be faired or painted rather than shown. When the load runs only lengthwise, the 11 oz unidirectional tape is stiffer per ply; for a fine show weave on tubes and rails, the 5.7 oz 3K plain weave tape. Widths start at 3 in; see the whole rack in carbon fiber tape.

  • Fiber Type: High-strength 12K carbon fiber
  • Weave Style: Plain weave
  • Fabric Weight: 12.3 oz/yd² (417 gsm)
  • Thickness: ~0.018″ (0.46 mm)
  • Width Options: 3″, 4″, 6″, 10″, 12″
  • Resin Compatibility: Epoxy, polyester, vinyl ester
  • Finish: Sizing optimized for resin adhesion
  • Roll Lengths: 1 yd, 3 yd, 10 yd, 100 yd (continuous when possible)

5.7oz Plain Weave Carbon Fiber by the linear yard

  • Heavyweight 12K fiber construction for maximum strength
  • Dense weave for fast buildup and enhanced stiffness
  • Excellent dimensional stability during wet layup or infusion
  • Compatible with a wide range of resin systems
  • Ideal for reinforcing stringers, hulls, structural beams, and load points
  • Durable and corrosion-resistant for long-term performance
  • Available in multiple widths to match project needs
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Variant Variant total Quantity Price Variant total
3" / 1 Yard
3" / 1 Yard
$8.34 USD/ea
Unit price $8.34  per yd
$0.00 USD
$8.34 USD/ea
Unit price $8.34  per yd
$0.00 USD
3" / 3 Yards
3" / 3 Yards
$22.53 USD/ea
Unit price $7.51  per yd
$0.00 USD
$22.53 USD/ea
Unit price $7.51  per yd
$0.00 USD
3" / 10 Yards
3" / 10 Yards
$62.60 USD/ea
Unit price $6.26  per yd
$0.00 USD
$62.60 USD/ea
Unit price $6.26  per yd
$0.00 USD
3" / Full Roll (100 Yards)
3" / Full Roll (100 Yards)
Sale price
$395.00 USD/ea
Regular price
$417.00 USD
Unit price $3.95  per yd
$0.00 USD
Sale price
$395.00 USD/ea
Regular price
$417.00 USD
Unit price $3.95  per yd
$0.00 USD
4" / 1 Yard
4" / 1 Yard
$9.73 USD/ea
Unit price $9.73  per yd
$0.00 USD
$9.73 USD/ea
Unit price $9.73  per yd
$0.00 USD
4" / 3 Yards
4" / 3 Yards
$26.28 USD/ea
Unit price $8.76  per yd
$0.00 USD
$26.28 USD/ea
Unit price $8.76  per yd
$0.00 USD
4" / 10 Yards
4" / 10 Yards
$73.00 USD/ea
Unit price $7.30  per yd
$0.00 USD
$73.00 USD/ea
Unit price $7.30  per yd
$0.00 USD
4" / Full Roll (100 Yards)
4" / Full Roll (100 Yards)
$487.00 USD/ea
Unit price $4.87  per yd
$0.00 USD
$487.00 USD/ea
Unit price $4.87  per yd
$0.00 USD
6" / 1 Yard
6" / 1 Yard
$13.84 USD/ea
Unit price $13.84  per yd
$0.00 USD
$13.84 USD/ea
Unit price $13.84  per yd
$0.00 USD
6" / 3 Yards
6" / 3 Yards
$37.38 USD/ea
Unit price $12.46  per yd
$0.00 USD
$37.38 USD/ea
Unit price $12.46  per yd
$0.00 USD
6" / 10 Yards
6" / 10 Yards
$103.80 USD/ea
Unit price $10.38  per yd
$0.00 USD
$103.80 USD/ea
Unit price $10.38  per yd
$0.00 USD
6" / Full Roll (100 Yards)
6" / Full Roll (100 Yards)
$692.00 USD/ea
Unit price $6.92  per yd
$0.00 USD
$692.00 USD/ea
Unit price $6.92  per yd
$0.00 USD
10" / 1 Yard
10" / 1 Yard
$16.95 USD/ea
Unit price $16.95  per yd
$0.00 USD
$16.95 USD/ea
Unit price $16.95  per yd
$0.00 USD
10" / 3 Yards
10" / 3 Yards
$44.95 USD/ea
Unit price $14.98  per yd
$0.00 USD
$44.95 USD/ea
Unit price $14.98  per yd
$0.00 USD
10" / 10 Yards
10" / 10 Yards
$124.95 USD/ea
$0.00 USD
Sold out
$124.95 USD/ea $0.00 USD
10" / Full Roll (100 Yards)
10" / Full Roll (100 Yards)
$1,125.00 USD/ea
$0.00 USD
Sold out
$1,125.00 USD/ea $0.00 USD
12" / 1 Yard
12" / 1 Yard
$18.00 USD/ea
Unit price $18.00  per yd
$0.00 USD
$18.00 USD/ea
Unit price $18.00  per yd
$0.00 USD
12" / 3 Yards
12" / 3 Yards
$48.60 USD/ea
Unit price $16.20  per yd
$0.00 USD
$48.60 USD/ea
Unit price $16.20  per yd
$0.00 USD
12" / 10 Yards
12" / 10 Yards
$135.00 USD/ea
Unit price $13.50  per yd
$0.00 USD
$135.00 USD/ea
Unit price $13.50  per yd
$0.00 USD
12" / Full Roll (100 Yards)
12" / Full Roll (100 Yards)
$1,325.00 USD/ea
Unit price $13.25  per yd
$0.00 USD
$1,325.00 USD/ea
Unit price $13.25  per yd
$0.00 USD

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What To Expect When You Order Fabric Rolls

Works Great For:

Marine

Boat Building & Repairs

Aerospace

Built for airplane specs

Automotive

Fiberglass car body repair

Close-up of 5.7oz 3K plain weave carbon fiber fabric showing the tight, even over-under checkerboard tow pattern.

Product Comparison

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Flexbility

Volume / Build Up

Epoxy Usage

Specifications

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Flexbility

Volume / Build Up

Epoxy Usage

Specifications

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Flexbility

Volume / Build Up

Epoxy Usage

Specifications

SHOP NOW

Flexbility

Volume / Build Up

Epoxy Usage

Specifications

SHOP NOW

Flexbility

Volume / Build Up

Epoxy Usage

Specifications

SHOP NOW

Flexbility

Volume / Build Up

Epoxy Usage

Specifications

FAQ

Frequently Asked Questions

Close-up of 5.7oz 3K plain weave carbon fiber fabric showing the tight, even over-under checkerboard tow pattern.

Carbon fiber is a high-strength, lightweight material made from thin strands of carbon. It’s used in aerospace, marine, automotive, sporting goods, and composite construction for its superior strength-to-weight ratio.

Yes, epoxy resin is the most commonly used resin with carbon fiber, providing a strong, durable bond for structural and cosmetic applications.

Carbon fiber has a tensile strength around 500,000 psi and is roughly five times stronger than steel by weight, which is why it is used where stiffness and low weight both matter. Real-world laminate strength depends on resin, fiber orientation, and layup quality, so a strong carbon panel comes from good wet-out and proper ply orientation, not the fabric alone.

Carbon fiber is stiffer, stronger, and lighter than fiberglass, but also more expensive. It’s used when performance and weight savings are critical.