Best Engine Sealant in 2022: Top Brands Review

Sometimes it might be quite difficult to find the best engine sealant. With every niche market offering so many different products, it makes sense that this is the case.

Unfortunately, this very fact can make it incredibly difficult to find the item that best suits your needs, which is why we’ve put together this engine sealant buying guide.

Our 15 Favorites:

The 15 Best Engine Sealant Reviews:

Bestseller No. 1
J-B Weld 31314 High Temperature RTV Silicone Gasket Maker and Sealant - Red - 3 oz.
  • HI TEMP RED SILICONE GASKET MAKER & SEALANT: Is an RTV (Room Temperature Vulcanized) Silicone gasketing material, designed for use in mechanical assemblies where the existence of higher, continuous temperatures up to 550º F or 650º F intermittent might exist
  • COUNT ON US: For more than 40 years, our products have earned a loyal following from people who take pride in their work. With each product we innovate, we continue to provide the world's strongest bond for your projects
  • EASY TO USE: Curing when the product is exposed to the moisture in air, it forms a tough, waterproof seal on most surfaces. It will not shrink or crack, resists weathering and is sensor safe
  • VERSATILE & DEPENDABLE: Ideal for automotive, metal, oil pans, exhaust manifolds, water pumps, timing covers, differential covers, drive housings and oven doors
  • DO IT YOURSELF: Big or small, you can DIY it with J-B. Our heavy duty adhesives repair & restore it right the first time. JB Weld delivers the legendary performance of the World's Strongest Bond
Bestseller No. 2
Permatex 82180 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, Sensor Safe And Non-Corrosive, For High Flex And Oil Resistant Applications 3.35oz Tube
  • Non-Corrosive Formula - Ultra Black Maximum Oil Resistance Silicone Gasket Maker Is Sensor-safe; With A Non-Corrosive Formula Designed For Superior Adhesion To Oily Surfaces And Long Term Durability
  • Superior Resistance - Powertrain Fluids Including Engine Oil, Transmission Fluid, Gear Lube And Coolants To Keep Your Application Locked In Place To Create A Strong Long Lasting Seal
  • High Flexibility - Ultra Black Silicone Gasket Maker Retains High Flexibility And Oil Resistant Properties And Can Be Used To Replace Pre Cut Gaskets Or Be Used As A Gasket Maker Or Gasket Sealant
  • Long-lasting And Durable - Ultra Black Resists Aging, Weathering And Thermal Cycling Without Hardening, Shrinking Or Cracking. With A Temperature Range Of -65°f To 500°f (-54°c To 260°c) Intermittent
  • Suggested Applications: Valve Covers And Valve Guides, Oil Pans, Transmission Pans, Intake Manifold End Seals, Timing Gear Covers, And Differential Covers
SaleBestseller No. 3
ACDelco GM Original Equipment 10-2006 RTV Engine Sealant - 75 g
  • Engineered for use on a variety of engine components – effective on: oil pan, ladder frame, front and rear covers, t-joints, manifold corners, intake, manifold end seals, and cam covers
  • Designed for quick and easy application, assembly may be filled with oil or coolant immediately after applying sealant and torqueing the bolts
  • High viscosity product that cures when exposed to air
  • Country of Origin: United States
Bestseller No. 4
Bar's Leaks Oil Seal Engine Oil Burning and Leak Repair
  • This Premium Quality Synthetic Blend Works With All Types Of Motor/Engine Oil Including Regular Petroleum, High Mileage, Synthetic Blends And Fully Synthetic Formulas
  • Works In All Gasoline And Diesel Engines Including Turbocharged, Eco Boost, Hybrid And Even Racing Engines, Including 3, 4, 5, 6, 8 And 10 Cylinder Engines In All Cars, Trucks, Vans And Suv'S
  • Can Also Be Used In Heavy-Duty Applications As Well As Tractors, Boats, Rv'S, Motorcycles (Including Wet Clutch), Atv'S, Lawn Equipment
  • In Most Cases The Oil Leak Issue Will Be Repaired With A Single Dosage. However, For Best Results And To Prevent The Problems From Reoccurring, Use With Every Other Oil Change, Or Once Per Year
Bestseller No. 5
ACDelco GM Original Equipment 10-2010 RTV Engine Sealant - 5.3 oz Cartridge
  • Engineered for use on a variety of engine components – effective on: oil pan, ladder frame, front and rear covers, t-joints, manifold corners, intake, manifold end seals, and cam covers
  • Designed for quick and easy application, assembly may be filled with oil or coolant immediately after applying sealant and torqueing the bolts
  • High viscosity product that cures when exposed to air
SaleBestseller No. 6
Permatex 82194 Ultra Grey Rigid High-Torque RTV Silicone Gasket Maker, 3.5 oz.
  • Designed specially for high-torque and high vibration applications
  • Maximum vibration resistance, with outstanding resistance to oils, cooling and shop fluids
  • Low odor and non-corrosive formula
  • Suggested Applications: Valve covers, oil pans, intake manifold end seals, timing covers, water pumps, thermostat housings
SaleBestseller No. 7
K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair, Blue
  • Permanent Coolant Leak Repair - Just Shake, Pour And Go
  • Mixes With All Antifreeze
  • No Draining Or Flushing
  • Fixes Cracks And Leaks In Radiator, Head Gasket, Freeze Plugs, Cylinder Heads, Heater Core, Water Pump Casing And Engine Blocks
SaleBestseller No. 8
3 oz Blue Silicone Waterproof Sealant, Universal Multipurpose Fast Cure Adhesive and Sealant for a Wide Range of Gaskets,Engines, Clutches, Boats, Glass, Tiles, Bathrooms, Swimming Pools,Plastic
  • 【Wide application】Suitable for metal, glass, wood, plastic, rubber, silicone, ceramic products. Can be used for bonding between the same material or different materials. This glue is extremely waterproof and high temperature resistant, very durable and ideal for sealing and repairing items. The glue is suitable for a variety of uneven, rough and vertical surfaces.
  • 【Super viscosity】unique adhesive properties, can achieve tight bonding between the same material or different materials in a short time, excellent adhesion, fast non-stick time and can be painted.
  • 【Superior Performance】This sealant has super waterproof, high temperature resistance, anti-corrosion, long service life and excellent adhesion to most items.
  • 【Safe and non-toxic】We insist on producing exclusive sealant formulations, which have passed MSDS, SGS and various safety reports. Our glue is 100% safe and environmentally friendly. It is non-toxic and does not hurt your hands. It can be applied by hand. After use, you only need to wash the residual glue on your hands with water.
  • 【What You'll Get】85 grams of Blue, safe, non-toxic professional sealant and lifetime technical support, backed by 24/7 friendly customer service. Unique glue packaging makes your use easier. Each glue comes with an applicator tip,Attach nozzle and cut to desired bead size.
SaleBestseller No. 9
Realth Silicone Gasket Maker High Temperature RTV 3.53 Oz Ultra Black Oil Resistance Sealant High Strength Flange Sealing for Automotive Motorbike Machine Equipment Repairing(SG119)
  • ALL-POWERFUL: This silicone gasket maker can work on all metal, such as stainless steel, aluminum, brass even it is plated or contaminated by minor oils. Also it works on glass, wooden object and anywhere need to seal. They will set completely after 24H and be disassembling.
  • APPLYING OCCASION: Ideal for automotive, motorbike, all kinds of metal, oil pans, exhaust manifolds, water pumps, timing covers, differential covers, drive housings, oil pans, valve covers, thermostat housing, mechanical assemblies, machine equipment, 3D printer and oven doors.
  • WONDERFUL PERFORMANCE: This RTV (Room Temperature Vulcanized) Silicone gasket maker is more oil resistant than conventional silicone, more flexible than cut gaskets. Safe, low odor and non-corrosive with superior adhesion, endure temperatures up to -60º C ~ 280º C.
  • HOW IT WORKS: Clean the surface of gasket or o-ring, coat our sealant on the gasket and put it where it is. It will form a tough and waterproof seal between tiny gap when the product is exposed to the moisture in air. It will not shrink, drip, run, leak and crack, resists any weather.
  • HEAVY DUTY: Our RTV silicone is great for working on many tasks. Better than traditional glues and epoxies. Definitely a different odor but maybe that has something to do with its superior performance. Perfect for oil-resistant gaskets on motorcycle, various electrical applications as an insulator with high temperature bond strength and other miscellaneous application.
Bestseller No. 10
ATP AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle
  • Professional strength fast acting resealer, stops leaks fast
  • Rejuivinates all rubber seals & gaskets in engines, transmissions, power steering, differentials and hydraulic systems
  • Compatible with conventional and synthetic oils, ATF, gear oil, power steering fluids and hydraulic oil
  • Does not contain petroleum distillates, will not over-swell or breakdown seals
  • 8oz bottle will treat a 6 quart capacity, adjust accordingly
Bestseller No. 11
Bar's Leaks High Mileage Engine Repair, 16.9 oz
  • Increases Oil Pressure
  • Reduces Friction
  • Helps Clean Internal Parts
  • Quiets Noise
SaleBestseller No. 12
Genuine Chrysler Accessories (4883971AB) RTV Silicone Rubber Adhesive Engine Sealant - 3 oz. Tube
  • Specially formulated RTV silicone rubber adhesive engine sealant
  • Used to seal components
  • Formulated for automotive use
  • Genuine OEM Chrysler fluid
  • Black silicone rubber RTV
Bestseller No. 13
K-Seal ST3501 Pour and Go Permanent Head Gasket and Block Repair, 16 fl. oz
  • Just Pour & Go – No Need for Expensive Head Gasket Repairs - The Safe and Easy Way to Fix a Coolant Leak
  • Fixes blown head gaskets, cracked heads and blocks
  • A permanent repair, guaranteed for the lifetime of the engine
  • Scientifically Tested - K-Seal is the only product to have been successfully tested by the equipment at Brighton University and classes as meeting the demands of ASTM D3147
  • If product did not seal head gasket leak, the system might be Over-pressurized, which causes back pressure and doesn't allow the product to reach the problem area, on this page below under Technical Specification is a PDF Guide with instructions to follow to complete the repair successfully
Bestseller No. 14
Permatex 82099 Spray Sealant, 12 oz.
  • Durable rubber barrier stops leaks in minutes
  • Targets low pressure leaks in hoses, oil pans, differentials, transmission pans, as well as plastic, PVC and metal pipes
  • Eliminates the need for liquid additive sealers that can swell and foul internal seals
  • Seals hard-to-reach leaks without the need for disassembling or removing parts
  • Resists common shop fluids
SaleBestseller No. 15
Genuine Ford Fluid TA-31 RTV Silicone Sealant - 5 oz.
  • A specially designed alkoxy cure RTV sealant for high temperature applications
  • Specifically recommended for use with the 7.3L power stroke, 6.0L and 6.4L diesel engine
  • High viscosity material which starts to cure in minutes
  • Non-corrosive sealant
  • Formulated for automotive use

Last update on 2022-12-06 / Affiliate links / Images from Amazon Product Advertising API

How to find the best engine sealant?

Here, we’ll be going over a number of factors that you can use to ensure that you’re purchasing the best engine sealant for you.

Regardless of which type of item you’re looking to buy, chances are that there are existing buying guides on the internet, all of which aim to give you good engine sealant recommendations.

Despite these recommendations, however, it’s always a good idea to do your own research. In addition to this research, asking yourself the following questions is also super helpful:

  • What features does the engine sealant need to have to be perfect for my needs?
  • What is my budget?
  • Do I need to purchase a certain brand?

Once you’ve answered these questions and have a good idea of what you’re looking for and the buying process becomes much easier. Keep in mind that when looking for the best product, there’s no need to rush. In fact, very rarely are the ideal products found by choosing the first one you see or by basing your decisions on only one factor. Take your time and enjoy the process!

Now, with the answers to the previous questions in mind, we urge you to use our upcoming buying guide for engine sealant to find what you’re looking for:

Brand

In some cases, the brand of engine sealant is very important. For example, if you’re looking for an item that works in tandem with another, you might very well need both products to be the same brand. If this is the case, it’s vital to pay attention to this factor, as choosing the wrong product can mean the difference between wasting your money and buying a great product that functions as it should.

Features

The features in any given engine sealant are important because they can dictate which version of an item you need and how much money you need to spend. Consider all the key features that you want your item to have and don’t settle for anything that doesn’t check at least ¾ of your boxes.

Reviews

Customer reviews about engine sealant are crucial – especially when you’re buying a product that costs a lot of money or serves a big importance. Luckily, most products can be found online, which means that it’s common for there to be scores of customer reviews from those who have already purchased any given product.

Pay attention to these reviews. Take note of the pros and cons that they mention, and factor these into your big decision. In some cases, you’ll be forced to sacrifice one con in order to gain a particular pro, but being aware of the potential con is going to be beneficial in either case.

Quality

Of course, quality is key. You don’t want to purchase a low-quality product. If you do, you run the risk of your item breaking, not working properly, or otherwise proving to be very disappointing, as well as a waste of money.

You can compare engine sealant quality by researching what your potential purchases are made from, contrasting the individual items against each other to discern which one is made of the best materials.

Warranty

Warranty isn’t always going to be important, but it definitely can be. This is especially true if the item in question is tech-related or expensive. A good warranty will be valid for an extended time after purchase and cover a variety of problems ranging from item defects to random accidents, water damage, and other miscellaneous events that could ruin your product.

Conclusion

The quest to find the best engine sealant can be daunting – but it doesn’t have to be. It can be made much easier by asking yourself a few simple questions and then thinking critically about the items you want to buy. Consider their features, quality, brand, warranty, and customer reviews and you’re more likely to make a great purchase.