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Top rated automotive gasket sealers

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Top rated automotive gasket sealers

AI-generated summary · updated August 1, 2026 · verify details before purchase.

  1. Permatex 81182 Ultra Black Max Oil Resistance RTV Silicone Gasket Maker
    Best overall Permatex

    Permatex 81182 Ultra Black Max Oil Resistance RTV Silicone Gasket Maker

    4.7/5 $19.30

    High-performance RTV silicone that resists oil, transmission fluid, and coolant. Excellent for sealing oil pans and valve covers.

    • Excellent oil resistance
    • Works well on rough surfaces
    • Sensor-safe
    • Cure time may be longer in cooler temps
    View on Amazon manufacturer site
  2. Permatex 82180 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker
    High temperature applications Permatex

    Permatex 82180 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker

    4.6/5 $9.79

    Formulated for high-heat applications up to 700°F intermittent. Ideal for exhaust manifolds and headers.

    • Withstands extreme heat
    • Good adhesion
    • Resists common automotive fluids
    • Not for use on plastic
    View on Amazon manufacturer site
  3. Fel-Pro RDS 35010 Rubberized Gasket Sealer
    Best budget pick Fel-Pro

    Fel-Pro RDS 35010 Rubberized Gasket Sealer

    4.5/5 $8.99 Only 18 left

    Aerosol sealer that dries flexible and works on gaskets and seals. Popular for paper gaskets and lightweight applications.

    • Easy to apply
    • Dries quickly
    • Flexible seal
    • Not for heavy-duty sealing
    View on Amazon
  4. CRC Gasket Eliminator Gasket Maker & Sealer
    Gasket elimination CRC

    CRC Gasket Eliminator Gasket Maker & Sealer

    4.4/5 $14.95

    A non-silicone, medium-strength formula that replaces pre-cut gaskets. Ideal for water pumps and thermostat housings.

    • No silicone mess
    • Strong bond
    • Works on many surfaces
    • Can be hard to remove
    View on Amazon manufacturer site
  5. Permatex 85420 Ultra Blue RTV Silicone Gasket Maker
    Versatile general use Permatex

    Permatex 85420 Ultra Blue RTV Silicone Gasket Maker

    4.6/5 $13.74

    Versatile RTV silicone for general automotive gasket making. Oil, water, and transmission fluid resistant.

    • Reliable seal
    • Sensor-safe
    • Non-corrosive
    • Not for high-heat
    View on Amazon manufacturer site
  6. Loctite 5910 Grey High-Temp & Sensitive Surfaces Gasket Sealant
    Sensitive surfaces (plastic/uPVC) Loctite

    Loctite 5910 Grey High-Temp & Sensitive Surfaces Gasket Sealant

    4.5/5 $11.28 Only 3 left

    Formulated for use on plastic and painted surfaces. High-temperature resistance and good oil resistance.

    • Safe on plastics
    • High temp tolerance
    • Good oil resistance
    • Slightly expensive
    View on Amazon manufacturer site
  7. Right Stuff 25210 PermaDryPlus Gasket Maker
    Professional-grade strength Permatex

    Right Stuff 25210 PermaDryPlus Gasket Maker

    4.6/5 $34.70

    Premium gasket maker with extreme adhesion and high torque retention. Designed for high-performance and heavy-duty applications.

    • Exceptional strength
    • Withstands high oil pressure
    • Fast curing
    • More expensive
    • Difficult to remove
    View on Amazon

Buying advice

When choosing a gasket sealer, consider the operating temperature, fluid exposure (oil, coolant, etc.), and surface material. For high-heat areas like exhaust manifolds, use a copper or high-temp silicone. For oil pans and valve covers, black RTV offers excellent oil resistance. If you need a versatile option for general use, blue or grey sealants work well. Always ensure surfaces are clean and dry before application.

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