Chopped Strand Mat (CSM) Emulsion Bound

Chopped Strand Mat (CSM) – Emulsion Bound

Chopped Strand Mat (CSM) Emulsion Bound is a versatile fibreglass reinforcement made from randomly distributed chopped glass fibres held together with an emulsion binder. Designed for fast wet-out and easy handling, it is widely used in hand layup, spray-up, and general fibreglass manufacturing applications.

The random fibre orientation provides multidirectional strength and excellent conformity over curves and complex mould shapes, making it a staple reinforcement in marine, automotive, and general composite fabrication.

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Key Features

• Random fibre orientation for multidirectional reinforcement
• Fast wet-out and easy resin absorption
• Excellent conformability over curves and contours
• Smooth laminate build-up and good bulk properties
• Easy to cut, shape, and laminate
• Suitable for general-purpose fibreglass applications

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Typical Applications

• Boat and marine construction
• Fibreglass repairs and maintenance
• Automotive panels and mouldings
• Tooling and mould manufacture
• General composite fabrication
• Laminate bulk build-up layers

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Processing Compatibility

Suitable for:

• Hand laminating
• Spray-up applications
• Compression moulding

Compatible with:

• Polyester resins
• Vinyl ester resins

Not generally recommended for epoxy resin systems due to emulsion binder compatibility.

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Why Use Emulsion Bound CSM

Emulsion-bound CSM provides excellent handling and flexibility, allowing it to easily conform to complex mould surfaces while creating uniform laminate thickness. It is commonly used to:

• Build laminate thickness quickly
• Improve interlaminar bonding between woven reinforcements
• Reduce print-through from heavier fabrics
• Create strong, economical fibreglass laminates

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Available Options

• Multiple weights available
• Standard roll widths
• General-purpose and marine-grade options

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Ironbark Tip

For best results:

• Fully wet out the mat to eliminate dry fibres
• Consolidate with laminating rollers to remove trapped air
• Layer with woven fibreglass fabrics for improved structural performance