Flexible Epoxy Adhesive

Thixo Flex Thickened Flexible Epoxy Adhesive


Thixo Flex Flexible Epoxy Adhesive forms permanent, flexible, waterproof bonds that withstand movement caused by changes in humidity, temperature, and load stresses. An essential part of any boat building or repair toolkit, this high-strength, sag-resistant epoxy adhesive bonds many different materials, including damp wood, fiberglass, metal, and most plastics.

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  • Pre-thickened, two-part epoxy adhesive cures to a flexible solid that forms permanent structural bonds
  • High-strength bonds hold firmly when subjected to stresses from contraction, expansion, vibration, and shock
  • Sag-resistant, easy to spread flexible epoxy is automatically measured, mixed, and dispensed through the included static mixing tip so it’s easy to get the exact ratio and a perfect cure
  • Works on wood, fiberglass, metals, glass, ceramics, and some plastics
  • Also bonds firmly to domestic and tropical hardwoods that are oily and typically hard to glue
  • Ideal for use in building wooden boats such as kayaks and canoes, and for bonding parts that are prone to flexing
  • Can be applied to dry, damp, or wet surfaces surfaces
  • Long working time and easy cleanup
  • Cured epoxy is waterproof, and can be sanded and painted
  • Use above or below the waterline
  • In addition to boat building and repair, you’ll find dozens of uses for fixing broken household items, sports equipment, and much more!
  • Versatile & flexible enough to use on boats, RVs, motorcycle fenders, athletic equipment, and household items
  • Size: Available in a 250 ml cartridge that fits most standard caulk guns (sold separately). Includes 2 static mixing tips.

An epoxy adhesive that stays flexible and copes with stress

It’s always a challenge to choose the right glue that will stick stuff together and keep it that way in watery, windy, wavy marine conditions. Especially when the stuff you’re sticking together doesn’t hold still and moves continually due to temperature and humidity fluctuations, flexing, and vibration.

TotalBoat Thixo Flex is a thickened, flexible epoxy adhesive that cures fairly quickly to form permanent structural bonds resilient enough to flex and hold strongly when subjected to the expansion, contraction, vibration, and shock stresses that can affect boats and boat parts. For this reason, Thixo Flex is the perfect adhesive for building and repairing wooden boats.

Sticks to a lot of different things, even when they’re damp or just plain difficult

Sorting through the multitude of adhesive products is enough to make you come unglued. Some work only on wood, others are better for bonding plastics. Thixo Flex can bond several different types of materials, as long as they’re prepared properly. Besides wood—even oily hardwoods like teak that are typically difficult to glue—Thixo Flex bonds fiberglass, aluminum and other metals, glass and ceramics, and most plastics, including ABS, PVC, HDPE, LDPE, and polycarbonate. Considering all the materials that make up a boat and its parts, Thixo Flex is the one adhesive that no complete marine toolkit should be without.

No mixing needed, and easier to use than other thickened 2-part flexible epoxies

Some two-part pre-thickened flexible epoxy adhesives come with the resin and hardener in separate tubes. You have to squeeze out the right amount of each, mix thoroughly by hand, and hope for good results. Thixo Flex has the resin and hardener inside a single cartridge that fits most standard caulking guns (sold separately). Just twist a static mixing tip—two are included—onto the cartridge, insert the cartridge into the caulking gun, and squeeze the handle. There’s no measuring. No mixing. No mess. Just point and pull the trigger to dispense a bead of adhesive measured to the exact ratio of 1 part resin to 1 part hardener and mixed thoroughly to get the perfect, reliable cure for gluing every job. Every time.

Much more than a marine adhesive

Because of all the different types of materials Thixo Flex can glue, just think of all the things it can help you build, restore, or fix. Birdhouses, dog sleds, bathtubs, carousel horses, bicycle frames, furniture, hockey sticks—and the list goes on. With Thixo Flex, you’re limited only by your imagination (and its physical properties, of course).


  • NOTE: Thixo cartridges have a slightly offset nozzle that fits most, but not all, caulk guns. Caulking applicators used with Thixo need to have a hole large enough for the mixing tip; cartridges won’t fit applicators with only a small hole for the nozzle.
  • Minumum application temperature: 40°F
  • Mix ratio by volume: 1 part resin to 1 part hardener
  • Gel time @ 72°F: 40 minutes
  • Recommended application thickness: Avoid exceeding 1/2″ material thickness
  • Working time (thin film): 75 minutes @ 72°F
  • Sandable: 7-10 hours @ 72°F
  • Cure time for high loads: 24 hours @ 72°F
  • Tensile strength: 5,330 psi
  • Compressive strength: 7,200 psi
  • Flexural strength: 8,800 psi
  • Color: Buff
  • Surface prep solvent: Acetone or denatured alcohol or TotalBoat Eco Solvent
  • Cleanup solvent: Acetone or denatured alcohol; cured material must be removed mechanically
  • Safety information: Avoid inhalation of vapors and ensure ventilation is adequate. Wear gloves and protective eyewear to keep mixed epoxy off of your skin and out of your eyes.

A Thixo for every job, no matter what you need to bond, fill, fillet, or glue

Not all epoxies work the same. We’ve expanded the Thixo range to suit different applications. Each one is available as one cartridge with 2 static mixing tips, or in a package of 6 cartridges with 12 static mixing tips. Whether you’re a professional or DIYer, our innovative 2:1 epoxy system will provide great results, at a great price.

Product Description For Use On Application Examples
  • Thick, translucent epoxy for bonding, sealing, gap filling, filleting, and tabbing
  • Use above and below the waterline
  • No sagging on vertical and overhead surfaces
  • Gel time: 30-35 minutes @ 77°F
Wood, metal, aluminum, fiberglass, block, brick, concrete, glass, slate, tile, stone, and more Adhesive: Bulkheads, deck cleats, rub rails, gunwales, and seat bases; stitch and glue construction; scarf joints and chine log joints; fillets

Sealant: Seal plumbing, tanks, and hatches; seal end grain

Filler: Fill deck holes where hardware was removed, deck-hull seams, castings, welds, and voids

Thixo LV
  • Low-viscosity, penetrating epoxy for laminating, filleting, and gluing
  • Use above and below the waterline
  • Gel time: 10 minutes @ 77°F
Wood, fiberglass, brick, concrete, cement, glass, acrylic Adhesive: Bond brick, concrete, cement, and composites. Great for filleting.

Sealant: Sidewalks, seams, steps, garage floors, and door frames

Filler: Seams, cracks, holes

Penetrating Epoxy: Laminating

Thixo Fast Cure
  • Stronger and cures over three times faster than regular Thixo
  • Ideal for bonding
  • Ready for sanding and high loads in just 4 hours
  • Use above and below the waterline
  • Gel time: 10 minutes @ 77°F
  • Slightly creamier in color than regular Thixo
Wood, metal, fiberglass, and more For bonding and sealing applications. Not for use as a gap filler.
Thixo Wood
  • Wood-colored formula is a little thicker than original Thixo
  • Cures to a dark brown, wood color
  • Ideal for wood boat construction and restoration
  • Use above and below the waterline
  • Gel time: 50 minutes @ 77°F
All types of wood Stitch and glue bonding, scarf joints, butt joints, seams, fillets, filling holes and voids, sealing hulls and decks, surfboards, and furniture
Thixo Flex
  • More flexible than original Thixo
  • Cures to a buff color
  • Able to withstand the stresses of expansion, contraction, shock, & vibration
  • Use above and below the waterline
  • Gel time: 40 minutes @ 72°F
Wood, fiberglass, metals, glass, ceramics, some plastics, and wet or difficult-to-bond hardwoods For building and repairing wooden boats and bonding parts that are prone to flexing.
Thixo PRO Original formula Thixo in a larger cartridge containing about 2½ times more epoxy Wood, metal, aluminum, fiberglass, block, brick, concrete, glass, slate, tile, stone, and more Use for the same type of applications as Thixo. Thixo PRO gives you more adhesive for bigger jobs and more complicated installations.

TotalBoat Thixo Flex Epoxy Adhesive Technical Data

Which Epoxy Should I Use for My Project?

Recommended TotalBoat Epoxies Listed by Project Type

Thixo Resin Part A SDS

Thixo Hardener Part B SDS

Frequently Asked Questions

What is the difference between Thixo Flexible Epoxy Adhesive and Thixo 2:1 Epoxy Adhesive?

Thixo Flex is a thickened epoxy that is more flexible than original Thixo. Regular epoxy adhesives cure to form rigid bonds. Thixo Flex tolerates movement, shock, and vibration.

What applications are Thixo Flex most appropriate for?

It is perfect for building and repairing wooden boats or bonding parts prone to flexing, and movement from weather-related expansion and contraction. It works on wood, fiberglass, metals, glass, ceramics, glass, some plastics, and wet or difficult-to-bond hardwoods.

Do I need a special caulk gun to dispense this epoxy?

No special caulk gun is needed. Thixo cartridges fit most standard caulk guns. However, you may find a high-ratio (18:1, 26:1 etc) caulk gun makes it easier to dispense. Always use the included mixing tip to ensure proper mix ratios.

Can I paint over Thixo Flex?

Yes. You can paint over Flex like any other epoxy.

Can gel coat be applied over it?

Epoxy and gel coat are known to have compatibility issues, so the same surface preparation as with any other epoxy repair product is necessary. Thixo Flex must be fully cured and sanded to rough up the surface in order to ensure mechanical bond.

Can the mixing tips be reused?

No, you must use a new tip for each use. Each cartridge comes equipped with two static mixing tips to ensure accurate mix ratio upon application.

What should I know before using Thixo Flex epoxy adhesive?

Store cartridges at room temperature (60-90°F) before use. Surfaces should be clean, dry, and sanded before application to remove dirt, dust, grease, loose paint, oils, or other contaminants. Apply when the temperature of the ambient air and substrate is 40°F or warmer. When finished, leave the static mixing tip on the tube to cure. For the next application, simply remove and replace the tip. For more information, refer to our application instructions.

What is the working time?

The working time of Thixo Flex is about 75 minutes at 72°F, which is ideal for larger projects that require extensive gluing.

What color does it cure to?

Thixo Flex cures to a buff color, comparable to a very light opaque brown.

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