How is the weight of 1.5 oz calculated?? "cloth is sold according to its weight per square yard" this is 11.5 oz/sy?!

Yes woven cloth and roving are specified differently. Chopped strand mat is specified in either grams per square meter or ounces per square foot. In the case of this product it would be 450 grams per square meter or 1.5 oz per square foot. We also offer a 1 oz version of this product (also epoxy compatible but the product page is out of date) it is ASIN: B01N20MS32. I hope this answers your question.

can you lay carpet on this? If so what kind of carpet glue should I use on boat carpet? Can this be applied to treated plyboard?ly

This cloth can be applied to wood or metal using fiberglass resin. Carpet can be applied as with any other smooth surface. I don't know of a specific adhesive for marine carpet.

Does this product use a styrene binder? Can I use it with epoxy?

It has a silane binder that is compatible with polyester, epoxy and vinylester resins. It is powder bound so it comes apart a little easier than emulsion bound and wets out easily.

Could you use this to reinforce craft concrete or concrete slabs?

I think you would want loose fibers for that. Most likely in the 1/2" to 1" length.

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Fiberglass Chopped Strand Mat - 1.5 Oz, 3 Yards x 50", Hand Layup, Infusion or Vacuum Bagging

Fiberglass Chopped Strand Mat - 1.5 Oz, 3 Yards x 50", Hand Layup, Infusion or Vacuum Bagging

Product ID: 88746007

Details

Brand
Griffco
Color
White
Item Form
Sheet
Item Thickness
0.05 inches
Shape
Flat

📏Builds thickness at 0.045 inch per layer

🔗Strong bonding layer for durable adhesion

🛡️Print-through barrier for flawless finish

Description

🛠️ Reinforce your projects with precision and style — don’t settle for less!

MOLDS TO EVERY DETAIL - Conforms smoothly to complex shapes, ideal for intricate marine, automotive, and DIY projects.
UNMATCHED LAYER BONDING - Creates a robust bond between woven roving layers for long-lasting composite strength.
FLAWLESS SURFACE PROTECTION - Acts as a reliable print-through barrier, ensuring your gel coat stays pristine and professional.
PRECISION THICKNESS CONTROL - Each layer adds a consistent 0.045 inch thickness, perfect for custom builds and repairs.
UNIFORM MULTI DIRECTIONAL STRENGTH - Engineered for consistent stiffness and reinforcement in every direction, no weak spots.

The Griffco 1.5 Oz Fiberglass Chopped Strand Mat (3 yards x 50" wide) is a versatile, high-performance composite material designed for hand layup, infusion, and vacuum bagging. It acts as a print-through barrier, provides strong bonding between layers, and builds thickness efficiently with uniform strength in all directions. Perfect for marine, automotive, and custom fabrication projects requiring detailed molding and durable reinforcement.

Specifications

ASIN	B07GN1BLC4
Brand Name	Griffco Products
Color	White
Customer Reviews	4.7 4.7 out of 5 stars (491)
Global Trade Identification Number	00867327000331
Grade Rating	Commercial/Industrial
Item Form	Sheet
Item Shape	Flat
Item Thickness	0.05 inches
Item Weight	3.5 pounds
Manufacturer	Griffco Products
Model Number	CSM450GW1270MM
Number of Items	1
Number of Packs	1
Part Number	CSM450GW1270MM
Specification Met	Partially Met

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