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10 Best gasket sealers of 2026
Save up to 41% off
Best Choice1
BlueDevil Products9.8Exceptional
BlueDevil Products 38386 Head Gasket Sealer - 1 Quart
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is discontinued by manufacturer:No
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package dimensions:8.86 x 3.46 x 3.35 inches 2.9 Pounds
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asin:B000NOO798
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date first available:February 22, 2007
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item model number:38386
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Value for Money2
Gasgacinch9.7Exceptional
Gasgacinch 440C Gasket Sealer and Belt Dressing, 16 oz, 1 Pack
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3
Permatex9.6Exceptional
Permatex 82180 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, Sensor Safe and Non-Corrosive, for High Flex and Oil Resistant Applications 3 oz
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is discontinued by manufacturer:No
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package dimensions:N/A
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asin:B0002UEN1U
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date first available:April 1, 2004
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item model number:82180
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4
Permatex9.4Excellent
Permatex 81630 Ultra Red High Temperature Gasket Maker, 3 oz
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is discontinued by manufacturer: No
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package dimensions:N/A
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asin:B08CRY2BJB
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date first available:June 20, 2020
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item model number: 81630
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5
Permatex9.2Excellent
Permatex 80019 Aviation Form-A-Gasket No. 3 Sealant, 4 oz.
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is discontinued by manufacturer:N/A
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package dimensions:N/A
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asin:B000HBM3QQ
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date first available:July 1, 2006
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item model number:N/A
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6
Permatex9.1Excellent
Permatex 22071 Water Pump and Thermostat RTV Silicone Gasket, 0.5 oz.
17% Off-
is discontinued by manufacturer: No
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package dimensions:N/A
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asin:B0007TQW60
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date first available:July 1, 2006
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item model number: 22071
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7
Permatex9.0Excellent
Permatex 82194 Ultra Grey Rigid High-Torque RTV Silicone Gasket Maker, 3.0 oz.
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is discontinued by manufacturer: Yes
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package dimensions:N/A
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asin:B000HBGI8K
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date first available:December 2, 2006
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item model number: 82194
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8
Permatex8.9Very Good
Permatex 85080 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, 9.5 oz. PowerBead Can
41% Off-
is discontinued by manufacturer:No
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package dimensions:N/A
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asin:B000HBGI1M
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date first available:July 7, 2004
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item model number:85080
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9
Bar's Leaks8.7Very Good
Bar's Leaks HG-1 HEAD SEAL Blown Head Gasket Repair
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Application Type:No flushing, draining, or thermostat removal required
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Fiber Reinforcement:Carbon fibers
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Compatibility:All 50-50 mix coolant types and water
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Engine Compatibility:Gasoline and diesel
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Product Type:Head Gasket Repair
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10
Permatex8.4Good
Permatex 80017 Aviation Form-A-Gasket No. 3 Sealant, 16 oz. , Brown
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