G/Flex 650-K Aluminum Boat Repair Kit


Sale price$48.95

Product Details

West Systems G/Flex 650-K Aluminum Boat Repair Kit is the cure for leaking seams and rivets or adhering patches on boats and canoes. It also works on fiberglass, wood, plastics, and metals.


  • The 650-K kit contains 4 oz. each of viscous liquid G/flex 650 resin and hardener. The mixing ratio is 1:1. It also includes two reusable mixing sticks/applicators, two 12-cc syringes, four grams adhesive filler (colloidal silica), four mixing cups, one pair of disposable gloves, four alcohol cleaning pads, and complete handling and repair instructions.
  • Mixed G/flex 650 is of a heavy "syrup" consistency. It will run off a vertical surface. The adhesive filler that comes with the kit can be used to thicken it to your desired consistency. Complete mixing instructions are included.
  • G/flex is a product of West System, a division of Gougeon Brother's, Inc. The Gougeon brothers have been using epoxy resins in boat building and repair for some 50 years.
  • It makes structural bonds that can absorb the stresses of expansion, contraction, shock, and vibration.
  • G/flex works very well to bond Hypalon to Hypalon or wood.
  • In addition to its superior bonding to many different materials and its ability to bond dissimilar materials, G/flex is much more flexible than other epoxies. This is an excellent property for boat building and repair.
  • Polyethylene (HDPE) is a common kayak and canoe material. Its molecular structure resists gluing by most adhesives. G/flex solves the problem; it bonds well to polyethylene and ABS plastics.
  • At 72 degrees F pot life is 45 minutes. The working time is 75 minutes. It cures to a solid in three hours and cures to its full strength in one to two days. It cures faster in warmer temperatures and slower in colder ones.
  • Clean-up is simple. Wipe up spills with absorbent materials. Clean residue before it cures, with alcohol or acetone.
  • G/flex adheres tenaciously to difficult-to-glue hardwoods, both tropical and domestic varieties.
  • It has the ability to glue damp woods. It can be used on wet surfaces, even underwater when applied with specific techniques.
  • G/flex does indeed belong in every boater's repair kit. The more you use it, the more uses you'll find for it - with your boating gear and other sporting and household items. It's easy to mix and use. The instructions that come with the kit are top-notch. 


    • 4 ounces each of thickened G/flex® 650 resin and hardener
    • 2 reusable mixing sticks/applicators
    • 2 12-cc syringes
    • 4 grams adhesive filler (colloidal silica)
    • 4 mixing cups
    • 1 pair disposable gloves
    • 4 alcohol cleaning pads
    • Complete handling and repair instructions
    • Mixing ratio of 1:1
    • Pot life: 45 minutes at 72 degrees F
    • Working time: 75 minutes at 72 degrees F
    • Cures to a solid at 72 degrees F
    • Reaches full strength in 1-2 days


    G/flex 650-K Aluminum Boat Repair Kit Instructions (pdf)

    G/Flex 650-K Sample Projects (pdf)

    D-ring pads and G/flex Epoxy (pdf)

    Gluing Plastic with G/Flex (pdf)

    Repairing a Royalex Canoe with G/Flex Epoxy (pdf)

    Material Safety Data Sheet G/flex 650 Epoxy Hardener (pdf)

    Material Safety Data Sheet G/Flex 650 Epoxy Resin (pdf)


    Payment & Security

    American Express Apple Pay Diners Club Discover Meta Pay Google Pay Mastercard Shop Pay Visa

    Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

    You may also like

    Recently viewed