Fiberglass Chopped Strand Mat Veil is also known as CSM, is made from chopped strands of glass fiber bound together with powdered or emulsion binders.
It is made from either C-glass or E-glass and mostly used in hand lay-up process alongside glass/carbon/Kevlar fiber cloth.

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Product Detail

Fiberglass Chopped Strand Mat Veil is also known as CSM, is made from chopped strands of glass fiber bound together with powdered or emulsion binders.

It is made from either C-glass or E-glass and mostly used in hand lay-up process alongside glass/carbon/Kevlar fiber cloth.

Key Features

Compatible with a variety of resin systems
Uniformly distributed fiber strands and binder
Flexible, good for complex shapes
High mechanical strength

List of Chopped Strand Mat

Weight (in GSM)	Filament Diameter(in μ)	Loss on ignition(%)	Width (in mm)
100	11	3-10	1040/2080
250	11	3-10	1040/2080
300	13	2-5	1040/2080
450	13	2-5	1040/2080
600	13	2-5	1040/2080

All the above weights are available in E-glass as well as C-glass and with powder as well as emulsion binders.

FAQ:

How to choose Fiberglass Chopped Strand Mat or Surface Veil for Stone Reinforcement?

Choosing a fiberglass chopped strand mat (CSM) or surface veil for stone reinforcement (such as backing slabs, marble, or granite countertops) requires evaluating several technical and application-oriented factors:

1. Mat Type: Chopped Strand Mat vs. Surface Veil

• Chopped Strand Mat (CSM): Made of randomly oriented short fibers held together by a binder. It provides multi-directional reinforcement, builds thickness quickly, and absorbs high amounts of resin to add structural rigidity to fragile or cracked stone slabs.

• Surface Veil / Tissue: An exceptionally thin, lightweight mat used primarily for smooth finishes, preventing fiber print-through, or creating a clean protective barrier on the back/surface of composite assemblies. For heavy structural reinforcement of stone, a heavier CSM is typically used, sometimes layered with a veil.

2. Areal Weight and Thickness

• Lighter Weights (e.g., 225 g/m² / 0.75 oz or lower): Ideal for minor repairs, tight corners, or applications where minimal weight and thinness are required.

• Standard Weights (e.g., 300–450 g/m² / 1.5 oz): The most common choice for general reinforcement and backing support, striking a balance between strength and flexibility.

• Heavier Weights (e.g., 600 g/m² / 2 oz or above): Used when maximum stiffness, bulk build-up, and high load-bearing capacity are needed for large or high-stress stone slabs.

3. Binder Type (Emulsion vs. Powder)

• Emulsion-Bonded Mats: Bound with an emulsion that dissolves slowly; typically softer, very compliant, and well-suited for hand lay-up contours.

• Powder-Bonded Mats: Dissolves faster and more thoroughly in styrene-containing resins, offering quick wet-out and uniform structural integrity.

4. Resin Compatibility

• Standard fiberglass chopped strand mats use a binder that requires styrene to dissolve properly.

• They are normally compatible with polyester and vinyl ester resins.

• If your stone reinforcement process calls for epoxy resin, standard CSM will not bond or wet-out correctly unless you source a specialized, epoxy-compatible mat. Always match the mat binder to your resin chemistry.

5. Application and Environmental Conditions

• Wet-Out Speed: Choose a mat with fast wet-out characteristics if you need the resin to saturate the fibers quickly before assembly or curing.

• Flexibility vs. Rigidity: Softer or lighter veils/mats conform better to irregular stone backs, veins, or contoured profiles.

• Testing: Always perform a small trial sample with your specific stone type, resin, and local ambient temperature/humidity before full-scale production.

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Öncesi : Fiberglass net/mesh/screen 60g 80g 7*9 3*3 4*5 20*10mm for stone marble/granite slab back netting