40oz Fiberglass E Cloth

SKU:FG-C4038-01

$32.44 USD

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88 in stock

Width: 38"

38"

Length: 1 Yard

1 Yard 3 Yards 10 Yards Full Roll (Approx. 70 Yards)

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Crafted with durable 40oz fiberglass, this cloth offers unparalleled protection for your projects. It's a must-have for any DIY enthusiast, as its strength and versatility make it perfect for countless applications.

At 40 oz/yd2 this is a double plain weave for very heavy, single-ply structural build, 38 inches wide. One layer lays down serious thickness, so plan resin volume and wet-out time accordingly. New to cloth weights? Start with our fiberglass cloth weight guide.

Specifications

Ideal for:

- Heavyweight Marine & Auto Repairs

- Reinforcing hulls, decks, and bulkheads on boats, especially in high-stress areas.

- Mold-making for larger marine parts.

Compatible with:

- Epoxy resin

- Polyester

- Vinyl ester resins for a flawless bond.

Resin Requirements:

- 38" Width:

- 50" Width:

Weight:

40oz/sqft

360oz/yard

Lightweight fabric ideal for most light-duty applications, commonly used where a clear wet-out is desired.

Includes

Features

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Technical Specifications

E-GlassDouble plain weaveWorks with Epoxy, Polyester, Vinyl Ester

MaterialE-Glass

Weight40 oz/yd²

Weave / ConstructionDouble plain weave

Fiber Orientation0°/90° (woven)

Available Widths38"

Full Roll Lengthapprox. 70 yd

Resin-to-Reinforcement Ratio~1:1 by weight

Compatible ResinsEpoxy, Polyester, Vinyl Ester

Best ForVery heavy structural build

Compare Fabrics

Product	40oz Fiberglass E ClothYou're viewingfrom $32.44	18oz Fiberglass E Clothfrom $17.49	18oz Woven Rovingfrom $19.44	24oz Woven Rovingfrom $22.39
Material	E-Glass	E-Glass	E-Glass	E-Glass
Weight	40 oz/yd²	18 oz/yd²	18 oz/yd²	24 oz/yd²
Weave	Double plain weave	Plain weave (2-end cloth)	Woven Roving	Woven Roving
Orientation	0°/90° (woven)	0°/90° (woven)	0°/90° (woven)	0°/90° (woven)
Widths	38"	50"	50"	50"
Full Roll	approx. 70 yd	125 yd	125 yd	approx. 52 yd
Thread Count	—	—	~5 × 4	~5 × 4
Resin Ratio	~1:1 by weight	~1:1 by weight	~1:1 by weight	~1:1 by weight
Resins	Epoxy, Polyester, Vinyl Ester	Epoxy, Polyester, Vinyl Ester	Epoxy, Polyester, Vinyl Ester	Epoxy, Polyester, Vinyl Ester
Best For	Very heavy structural build	Heavy structural reinforcement	Fast bulk build between mat layers	Heavy bulk build between mat layers
	Selected	View	View	View

What To Expect When You Order Fabric Rolls

Can epoxy resin be used with fiberglass cloth?

Yes, epoxy resin is ideal for wetting out fiberglass cloth and other reinforcements like carbon fiber and Kevlar. It saturates the fabric well and cures into a strong, durable laminate.

Can 10 oz fiberglass cloth be used on wood or metal?

Yes. With the right resin, 10 oz fiberglass cloth bonds to wood, metal, foam, and cured fiberglass. Use epoxy for wood and metal, since it grips those substrates far better than polyester. Prep matters more than the cloth: sand to clean, bare material, remove all dust and oil, and wet out the surface before laying the cloth down.

What does the weight (oz) of fiberglass cloth mean?

The weight refers to ounces per square yard. Lighter cloth (e.g., 4oz) is more flexible and used for fine finishing; heavier cloth (e.g., 10oz) provides more strength and bulk.

How do I cut fiberglass cloth?

Use sharp scissors or a utility knife. To reduce fraying, you can lightly mist the cloth with water or use tape to mark the cutting line.

What is fiberglass cloth used for?

Fiberglass cloth is used to reinforce composite materials in applications like boat building, surfboard repairs, auto bodywork, and structural laminates. It’s combined with resin to form a strong, lightweight composite.

What’s the difference between fiberglass cloth and chopped mat?

Fiberglass cloth is woven for strength in specific directions, while chopped strand mat is made of randomly oriented fibers and is better for building bulk.