CS-NRI Syntho-Plug Hull & Hole Damage Repair Kits



  • $ 65.99
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    CS-NRI Syntho-Plug Hull & Hole Damage Repair Kits

    Syntho-Plug™ is a polyurethane impregnated, water-activated foam plug used to temporarily repair hull damage ensuring a safe trip home or to mitigate spill containment. It is initially pliable to insert into void and quickly hardens to fill the void, reducing water intake, or output, from 280 GPM to less than 1 GPM. Works with fiberglass, steel, wood or aluminum, in fresh, brackish, or saltwater, and can be applied above or below the water line.


    Part Number Wrap Size Width (in) & Length (ft) Pipe Size coverage by wrap
    SP356 (Football) 3.25in x 6in oval football shape ½ to 1 in
    SP635 (Golfball) 3.25in x 3.25in round golfball shape 1 ¼ to 2 in


    Technical Specs

    Color Foam – Yellow, Urethane – White
    Cure Time 2 Minutes at 75°F (24°C)
    Resin Type Pre-impregnated
    Application Temperature 0° to 71°C
    • Football Shape: 3.25 inch x 6 inch
    • Golfball Shape: 1.5 inch round

    Typical Applications

    • Fast temporary Sealing of purchured or breaches in hulls, tanks, and large containers.
    • Emergency Repair
    • Underwater repair and splash zone


    • Ready to use
    • No mixing or mess
    • Needs no special tools
    • Environmentally safe
    • No VOCs
    • Delivers simple, effective, durable repir/restoration
    • Completely cures in minutes

    Physical Properties

    • VOCs: None
    • Set Time: 30 Minutes at 75°F (24°C)
    • Resin Type: Water-activated polyurethane
    • Resin Application: Pre-impregnated
    • Service Temperature: -50° to 250°F (-45° to 121°C)
    • Application Temperature: 32° to 150°F (0° to 65°C)
    • Pressure once cured w/primary sealant: Max 300 psi (20.6 bar)
    • NSF61 and BS6920 approved for potable water when Syntho-Steel is used as the primary sealant

    Working Time

    • 2 Minutes at 75°F (24°C)

    Shelf Life

    • 24 months with recommended storage

    Storage Conditions

    • Store in original container protected from direct sunlight in a dry, cool and well-ventilated area, away from incompatible materials, food and drink. Storage at temperature between 64°F and 86°F. Keep away from humidity and water. Keep container tightly closed and sealed until ready for use.
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