Meet Flex Seal Epoxy Extra Strength Black Epoxy Syringe from the Flex Seal Family of Products — a precise, high-force epoxy solution engineered for durable repairs that last. Packaged in a convenient 0.85 fl oz syringe, this non-sag epoxy paste delivers strong adhesion without dripping or slump, making it ideal for vertical and overhead applications.
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Extra-strength adhesion designed to withstand surface stress on a wide range of materials, delivering a robust bond you can trust for long-term repairs.
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Non-sag paste formula stays where you apply it, even on vertical surfaces, eliminating run-off and waste.
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Black epoxy color blends with darker substrates for a seamless, professional look on metal, wood, concrete, and more.
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Indoor and outdoor use — a versatile solution for repairs inside the home or on exterior projects, from gutters to driveways.
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Solvent resistant formula stands up to common environmental challenges, helping your repair maintain integrity over time.
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0.85 fl oz syringe with carded packaging for precise dispensing and controlled use, reducing waste.
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Full cure in 24 hours with a practical working time of about 45 minutes, so you can complete repairs efficiently and move on.
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Not flammable — a safer option for everyday repairs around the home or shop.
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Compatible with a broad spectrum of surfaces — metal, wood, PVC, tile, plastic, glass, ceramic, concrete, brick, stone, and more, making it a versatile addition to any toolbox.
Why choose this epoxy for your projects
From quick crack fills to securing components and reinforcing joints, this epoxy syringe is built for real-world repair tasks. The black color helps blends in with darker substrates, while the non-sag formula ensures a clean, professional finish. Its extra-strength bond handles stress where other adhesives fade, giving you confidence on both indoor and outdoor projects—whether you’re fixing a metal railing, sealing a cracked concrete step, or bonding a ceramic tile nook.
Ideal use scenarios
- Bonding metal components that experience vibration or load
- Sealing cracks and gaps in concrete, brick, or stone surfaces
- Repairs on PVC pipes, plastic fittings, or PVC trim
- Reinforcing tool handles, hardware mounts, or brackets
- Filling and repairing tile joints or ceramic surfaces
Application at a glance
- Prepare clean, dry surfaces for best adhesion.
- Extrude epoxy from the syringe and apply a thin, continuous bead where needed.
- Join parts and hold or clamp as required until initial set. Full cure occurs in 24 hours.
