Double Bias Fibreglass Mat 450gsm Full Roll 1270mm Width

450gsm ±45° Double Bias Fibreglass Cloth for Structural Composite Laminates

Double Bias Fibreglass Mat 450gsm is a stitched reinforcement fabric designed for high strength composite laminates in marine, automotive and industrial applications. Supplied in full rolls with a width of 1270mm and total roll weight of approximately 50kg, this material is ideal for large scale laminating and structural reinforcement work.

Constructed with continuous fibres stitched in a ±45° orientation, double bias mat provides excellent shear strength and multi-directional load distribution. This fibre alignment allows the laminate to better handle stress and movement compared to traditional chopped strand mat, making it a preferred choice for structural applications.

Unlike chopped strand mat, double bias fabrics contain no binder, allowing for improved resin penetration, faster wet-out and more efficient fibre-to-resin ratios. This results in stronger, lighter laminates with improved performance characteristics.

Compatible with polyester, vinyl ester and epoxy resin systems, this 450gsm double bias mat is widely used in boat building, composite fabrication and reinforcement applications where strength, consistency and efficiency are critical.

Features & Benefits

Key Features

• 450gsm stitched double bias fibreglass reinforcement
• Fibre orientation at ±45° for multi-directional strength
• Full roll format with 1270mm width and approx 50kg weight
• Continuous fibres with no binder for improved performance
• Compatible with polyester, vinyl ester and epoxy resins
• Designed for structural laminating applications

Key Benefits

• Delivers high shear strength and improved load distribution
• Creates stronger laminates compared to chopped strand mat
• Reduces resin consumption through efficient wet-out
• Maintains fibre alignment for structural integrity
• Suitable for large scale composite manufacturing
• Improves overall laminate performance and durability

How It Works

• Fibres are stitched at ±45° to handle stress in multiple directions
• Resin penetrates easily due to absence of binder
• Laminate cures into a high strength composite structure
• Fibre orientation improves shear strength and flexibility

Key Applications

• Boat building and marine structural laminates
• Automotive composite fabrication and reinforcement
• Fibreglass structural repairs and strengthening
• Mould making and tooling applications
• Industrial composite manufacturing
• Tank, pipe and structural fabrication

Trade Tips

• Use rollers to remove air and ensure full consolidation
• Pre-cut fabric before mixing resin for efficient workflow
• Layer with chopped strand mat when using polyester systems for improved bonding
• Adjust catalyst ratio based on ambient temperature

Double Bias Fibreglass Mat 450gsm Roll FAQs

Q1. What is double bias fibreglass mat used for
A1. It is used for structural reinforcement in composite laminates where high strength and load distribution are required.

Q2. What does ±45° mean
A2. It refers to fibres stitched diagonally in two directions, improving shear strength and multi-directional performance.

Q3. Is this stronger than chopped strand mat
A3. Yes, double bias fabrics provide significantly higher strength and better structural performance.

Q4. What resin systems can be used
A4. It is compatible with polyester, vinyl ester and epoxy resins.

Q5. What is the roll length
A5. Roll length can vary depending on manufacturer, but a 50kg roll at 450gsm is typically around 85–90 metres. Confirm with supplier for exact length.

Q6. Can it be used on curved surfaces
A6. Yes, it conforms well to curves while maintaining fibre strength.