West System G Flex 650 Epoxy Resin 2 Part Kit

Flexible Two Part Epoxy Adhesive for Structural Bonding, Repairs and Composite Applications

West System G Flex 650 Epoxy Resin Kit is a high performance two-part epoxy adhesive designed for strong, flexible bonding in demanding applications. Available in 250ml (2 x 125ml) and 1L (2 x 500ml) kits, this system is engineered to provide excellent adhesion while maintaining flexibility, making it ideal for materials subject to movement, vibration or impact.

Unlike traditional rigid epoxies, G Flex 650 cures to a tough, slightly flexible bond that resists cracking under stress. It bonds exceptionally well to a wide range of materials including fibreglass, timber, aluminium, steel, plastics and damp or difficult substrates. This makes it a go-to solution for repairs where conventional adhesives may fail.

The 1:1 mix ratio makes it easy to use, while the low viscosity allows for good wet-out and penetration into substrates. G Flex 650 is widely used in marine repairs, automotive applications, composite fabrication and general industrial maintenance where durability and reliability are critical.

Features & Benefits

Key Features

• Two-part epoxy adhesive system with 1:1 mix ratio
• Available in 250ml and 1L kits
• Cures to a tough, flexible bond
• Excellent adhesion to fibreglass, timber, metals and plastics
• Low viscosity for improved wet-out and penetration
• Suitable for bonding damp or difficult surfaces

Key Benefits

• Resists cracking under load, vibration and impact
• Provides strong, durable and flexible bonds
• Ideal for repairs where rigid epoxies may fail
• Easy to mix and apply with simple 1:1 ratio
• Versatile for a wide range of materials and applications
• Reliable performance in demanding environments

How It Works

• Resin and hardener are mixed at a 1:1 ratio
• Epoxy penetrates substrate for strong adhesion
• Cures into a tough, flexible polymer structure
• Maintains bond strength under movement and stress

Key Applications

• Marine repairs including boats and hulls
• Fibreglass and composite bonding
• Timber repairs and structural bonding
• Bonding metals and difficult substrates
• Automotive repairs and fabrication
• Industrial maintenance and repair work

Trade Tips

• Prepare surfaces by sanding and cleaning for best adhesion
• Use thickened epoxy for gap filling if required
• Apply consistent pressure during bonding for optimal results
• Allow full cure before applying load or stress

West System G Flex 650 Epoxy Resin 2 Part Kit FAQs

Q1. What is G Flex 650 used for
A1. It is used for bonding and repairing materials where flexibility and impact resistance are required.

Q2. What makes G Flex different from standard epoxy
A2. It cures to a flexible bond that resists cracking under stress, unlike rigid epoxies.

Q3. What materials can it bond to
A3. It bonds to fibreglass, timber, metals, plastics and damp substrates.

Q4. What is the mixing ratio
A4. The mix ratio is 1:1 by volume.

Q5. Can it be used for marine repairs
A5. Yes, it is widely used for boat and marine repair applications.

Q6. Is it suitable for gap filling
A6. Yes, it can be thickened for gap filling applications if required.