Trade Secrets: G/flex® 650 vs. 655: Choosing the Right Epoxy Adhesive

When it comes to epoxy adhesives for marine, automotive, and household applications, G/flex 650 Toughened Epoxy and G/flex 655 Thickened Epoxy are two top contenders. Both are renowned for their strength and durability, but each offers unique benefits tailored to specific needs.

G/flex 650 Toughened Epoxy

G/flex 650 is a versatile, liquid epoxy with a honey-like consistency. Its fluidity makes it ideal for penetrating and bonding with various materials, including plastics, wood, and metals.

It is ideal for projects requiring a fluid adhesive that can penetrate and bond with various materials. It’s particularly useful for repairing plastic canoes and kayaks, wooden boats, and household items.

G/flex 655 Thickened Epoxy

G/flex 655 Thickened Epoxy is a versatile adhesive designed for applications that require a thicker, more controlled consistency. Its gel-like texture, similar to toothpaste, prevents it from running or dripping, making it ideal for vertical surfaces and overhead repairs.

Shared Features

Both G/flex 650 and G/flex 655 offer a range of benefits that make them popular choices for various bonding applications. These include:

Strong and durable bonds: Adhere firmly to a variety of materials.
Weather resistance: Withstand harsh conditions, including moisture and temperature extremes.
Easy application: Simple 1:1 mixing ratio by volume.

G/flex 650 Practical Applications

Aluminum boat repair: Its liquid consistency allows for effective penetration and bonding.
Polyethylene and ABS canoe/kayak repair: Versatile for different materials.
General bonding: Suitable for a wide range of household and industrial projects.

G/flex 655 Practical Applications

Vertical and overhead repairs: Its thicker consistency prevents sagging.
Wetting out fibreglass: Ideal for applications requiring a thicker adhesive.
Bonding difficult woods: Adheres well to hardwoods like white oak and ipe.

Choosing the Right Adhesive

When deciding between G/flex 650 and 655, consider the specific requirements of your project. If you need a customisable, liquid adhesive, G/flex 650 is an excellent option. However, for projects that require a thicker adhesive or involve vertical surfaces, G/flex 655 may be more suitable.

Additional Considerations

WEST SYSTEM® offers a variety of kits and sizes within the G/flex 650 and 655 range to meet your specific needs.
Consult the product data sheets for detailed information on application, curing times, and compatibility with different materials.

By understanding the unique properties and applications of G/flex 650 and 655, you can make an informed decision and achieve optimal bonding results.