
FLEX SEAL® EPOXIES
The Ultimate in Extreme Bonding.
Our Extreme Liquid and Ultimate Putty are two-part epoxies that deliver extraordinary strength and unmatched versatility with their multi-purpose formulas. Just one gram of our Extreme Liquid can lift and hold up to 8 tons*, while our Ultimate Putty creates a bond that can lift and hold up to 4 tons*. Both form an incredibly strong bond on virtually any material. From heavy-duty repairs to precision fixes, Flex Seal Epoxies create a durable, permanent bond you can rely on for your toughest jobs.
- Extreme bonding strength of 6,000 PSI (Liquid).
- Easy to use – simple to mix and apply for quick, reliable repairs.
- Forms a durable, waterproof barrier once cured.
- Can be applied to wet surfaces, even underwater (Putty).
- Highly durable – resistant to chemicals, fuel, and impacts.
- Won’t run or drip (Putty).
- Ideal for overhead, vertical, and hard-to-reach repairs.
- Workable finish – can be molded and shaped (Putty), filed, sanded, tapped, drilled, and painted (Liquid & Putty).
- Heat resistant – withstands temperatures up to 550°F (Liquid) / 350°F (Putty) once fully cured.
- Weatherproof – designed for extreme indoor and outdoor conditions.
- Adheres to most surfaces.
- Fast setting – 3 to 6 hours (Liquid) / 15 minutes (Putty).
- Perfect for filling gaps and cracks.
- Exceptional for sealing holes (Putty).
- Color when cured: Black (Liquid) / Dark Gray (Putty).
Excellent for: Automotive, marine and plumbing repairs; home, garage and outdoor projects; furniture, appliance, tool and equipment repairs; DIY, crafts and hobbies; emergency fixes; heavy-duty and industrial use.
Bonds to: Metal, copper, plastics (PVC, ABS), wood, concrete, stone, brick, ceramic tile, fiberglass, and more.
AVAILABLE IN:
- .85 fl oz syringe (Extreme Liquid)
- Twin .5 fl oz tube package (Extreme Liquid)
- 2 oz stick (Ultimate Putty)
WARNING: California Proposition 65 Notice.
*Lift and strength tests were conducted in controlled environments for demonstration purposes only. Attempting to replicate these tests is extremely dangerous and strongly discouraged. Do not attempt.
USAGE INSTRUCTIONS FOR SYRINGE:
MIXING STICK AND TRAY INCLUDED.
1. Prepare Surfaces: Protect your work area from spills. Clean and dry surfaces, removing dirt, grease, oil, and rust with sandpaper or a degreaser for the best bond. Do not use alcohol or any other cleaners that may leave a petroleum residue.
2. Dispense & Mix: Remove the "Snap and Save" cap from the syringe and save for later. Depress the plunger to dispense equal amounts of resin onto the included plastic tray or a clean, disposable surface. Mix until the color is uniform (approx. 1 minute).
3. Apply & Join: Apply the mixed epoxy to one surface, press parts firmly together, and clamp if necessary for heavy objects. Open work time is 25–45 minutes.
4. Cure: Sets in 3–6 hours at room temperature. Fully cures in 15–24 hours.
5. After Use: Pull the plunger back slightly, wipe the nozzle clean and replace the “Snap & Save” cap securely to prevent drying. Remove excess epoxy with a clean, dry cloth.
USAGE INSTRUCTIONS FOR TUBES:
MIXING STICK AND TRAY INCLUDED.
1. Prepare Surfaces: Protect your work area from spills. Clean and dry surfaces, removing dirt, grease, oil, and rust with sandpaper or a degreaser for the best bond. Do not use alcohol or any other cleaners that may leave a petroleum residue.
2. Dispense & Mix: Squeeze equal amounts of resin and hardener from each tube onto the included plastic tray or a clean, disposable surface. Mix thoroughly until the color is uniform (approx. 1 minute).
3. Apply & Join: Quickly apply the mixed epoxy to one surface, press parts firmly together, and clamp if necessary for heavy objects. Open work time is 25–45 minutes.
4. Cure: Sets in 3–6 hours at room temperature. Fully cures in 15–24 hours.
5. After Use: Wipe the tube nozzles clean and securely replace the caps to prevent drying. Remove excess epoxy with a clean, dry cloth and acetone or mineral spirits.









