Best Automotive Sealants in 2026

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

RTV Silicone sealant & adhesive : Is a general purpose RTV (Room Temperature Vulcanized) Silicone, designed for sealing and bonding uneven surfaces.

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 : Upon curing, the silicone forms a tough, waterproof seal on most surfaces. It will not shrink or crack, resists weathering and is great for many automotive accessories and household uses.

Economical general-purpose fitting sealant

Outperforms tapes and pipe dopes

Seals and resists pressure in air, oil, diesel fuel and hydraulic systems

Locks and seals threaded fittings

Resists leakage, vibration loosening, moisture, hydraulic fluids and diesel fuels

Lubricates threads for easy assembly and disassembly

Slow-drying, non-hardening brush-top sealant

Resists gasoline, oil and grease

Approved for use in aviation as well as automotive applications

These Are Complete Line Of Heavy-Duty Shop Products

These Products On Exceptionally High Order Fulfillment Rates, Breadth Of Available Products

Through Creativity, Productivity And Innovation - This Brand Continues To Develop The Finest Automotive Accessories

EASY APPLICATIONS: Brushable and paintable consistency

HIGH ADHESION: Works on both bare metal and painted surfaces

FAST SKINNING: Starts in about 10 to 15 minutes

Designed for locking and sealing high pressure hydraulic and pneumatic systems

Reliably cures on "as received" fasteners

Controlled locking strength affords easy disassembly

Slow-drying, non-hardening sealant

Allows for easy disassembly if required

For use where sealing is more important than adhesion

Designed specially for high-torque and high vibration applications

Maximum vibration resistance, with outstanding resistance to oils, cooling and shop fluids

OEM specified, guaranteed not to leak

Seals and secures metal pipes and fittings; fills the space between threaded metal parts

Prevents leakage caused by tape shredding, vibration loosening, solvent evaporation or damaged threads

Prevents corrosion and galling of threads

Easy to use: The BlueDevil Head Gasket Sealer is designed to be easy to use, allowing you to quickly and easily seal leaks in your engine without the need for any special tools or skills.

Permanent seal: This product is formulated to provide a permanent seal for your head gasket, ensuring that you won't have to worry about leaks or other issues down the line. It will repair and seal leaks in blown head gaskets, warped or cracked heads, heater cores, and freeze plugs.

Compatible with all types of engines: Compatible with gasoline and diesel engines, making it a versatile product that can be used on a wide range of vehicles.

For use on rigid machined flanges with less than .015 inch gap

Original Equipment Manufacurer (OEM) approved, for use where 'anaerobic' gasket is specified

Eliminates preformed, pre-cut, paper, rubber and cork gaskets

𝗔𝘂𝘁𝗼𝗺𝗼𝘁𝗶𝘃𝗲-𝗖𝗼𝗻𝘀𝘁𝗿𝘂𝗰𝘁𝗶𝗼𝗻 𝗠𝗮𝘁𝗲𝗿𝗶𝗮𝗹𝘀 Akfix 657FC metal gap filler has excellent adhesion to sheet iron, aluminum, stainless steel, lead, copper, ceramic, glass, wood and various plastic and metal materials. Joint surfaces must be dry, clean, and free of all contamination.

𝗗𝘂𝗿𝗮𝗯𝗹𝗲 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 Specially designed for body construction of cars, containers, caravans, and projects that require durability in the automotive and construction industry.

𝗣𝗼𝘄𝗲𝗿𝗳𝘂𝗹 𝗖𝗼𝗺𝗽𝗼𝗻𝗲𝗻𝘁 Properties of polyurethane sealants, such as hardness, adhesion strength, thixotropy, and flexibility, can easily be modified to meet needs. Compared to other components, this metal sealer may reach very high mechanical and adhesion strength levels.

Specially engineered for making or dressing gaskets in rigid assemblies

Fills gaps up to 0.020 inches

Permits clamping loads to be maintained for strong, leakproof assemblies

𝗛𝗜 𝗧𝗘𝗠𝗣 𝗛𝗘𝗔𝗧 𝗥𝗘𝗦𝗜𝗦𝗧𝗔𝗡𝗖𝗘 Kraken Bond Gasket Maker is an extremely strong, long-lasting adhesive that can withstand high temperatures and is a high heat silicone sealant. Excellent heat resistance after curing at temperatures ranging from 482°F permanently to 572°F temporarily.

𝗦𝗧𝗥𝗢𝗡𝗚 𝗦𝗘𝗔𝗟𝗔𝗡𝗧 After curing, this gasket sealant is resistant to mechanical enforcement. No cracking, shrinking, or brittleness.

𝗔𝗣𝗣𝗟𝗜𝗖𝗔𝗧𝗜𝗢𝗡 𝗔𝗥𝗘𝗔𝗦 Our 100% silicone gasket sealer is a gap filler that is used for waterproof sealing and bonding in stoves, chimneys, gaskets in pumps, motors, automobiles, and other places where parts must perform at high temperatures and heat.

𝗛𝗜 𝗧𝗘𝗠𝗣 𝗛𝗘𝗔𝗧 𝗥𝗘𝗦𝗜𝗦𝗧𝗔𝗡𝗖𝗘 Kraken Bond Gasket Maker is an extremely strong, long-lasting adhesive that can withstand high temperatures and is a high heat silicone sealant. Excellent heat resistance after curing at temperatures ranging from 482°F permanently to 572°F temporarily.

𝗦𝗧𝗥𝗢𝗡𝗚 𝗦𝗘𝗔𝗟𝗔𝗡𝗧 After curing, this gasket sealant is resistant to mechanical enforcement. No cracking, shrinking, or brittleness.

𝗔𝗣𝗣𝗟𝗜𝗖𝗔𝗧𝗜𝗢𝗡 𝗔𝗥𝗘𝗔𝗦 Our 100% silicone gasket sealer is a gap filler that is used for waterproof sealing and bonding in stoves, chimneys, gaskets in pumps, motors, automobiles, and other places where parts must perform at high temperatures and heat.

This latest elastomeric rubber gasket technology is blowout resistant and outperforms pre-cut gaskets

Protects against leaks caused by vibration and thermal expansion

Temperature range: -75F to 450F continuous, 500F intermittent

High strength, moisture curing RTV silicone; maintains long-term durability and flexibility

Forms a tough, flexible silicone rubber material; resists aging and weathering providing a leak proof seal

Use to bond, seal, insulate, repair, fill voids and more

This latest elastomeric rubber gasket technology is blowout resistant and outperforms pre-cut gaskets

Protects against leaks caused by vibration and thermal expansion

Temperature range: -75F to 450F continuous, 500F intermittent

Formulated for hi-temp applications, or heavy-duty use

Replaces almost any cut gasket, and coats pre-cut gaskets to increase reliability

Makes reliable 'formed-in-place' gaskets that resist cracking, shrinking and migrating

Conditions & protects door gaskets

Great to protect and add life to window seals

Protects and beautifies plastic trim parts

Superior Enhanced Look

Oil and Grease Resistant

Resists Color Fading

Each batch tested to ASTM G-72

Pressures: to 2, 600 PSI (180 BAR)

Sealing temperature: -320 degree F to 450 degree F (-196 degree C to 232 degree C)

DESIGN USE. Noncorrosive anaerobic designed primarily for use on aluminum, iron and steel flanged mating surfaces.

PREMIUM. Ideal for on-the-spot and emergency repairs, or when a conventional gasket is out of stock.

FILLS & SEALS. Fills gaps up to 0.050" (1.27 mm) and forms a flexible, solvent-resistant seal that will not tear or decay.

CRC INDUSTRIES: A market leader that offers impeccably designed chemical solutions to maintain, protect and repair different marine, heavy-duty motor vehicles, industrial-grade engines, household tools and electrical equipment.

SILICONE SEALANT: CRC RTV Silicone Sealant is designed for a wide range of sealing, bonding, protecting, and waterproofing. Red is designed as a high temperature, low odor, non-corrosive gasket sealant.

DURABLE PERFORMANCE: Stands up to tough conditions such as rain, snow, and extreme temperatures. Great for indoor and outdoor use.

DESIGN USE. Noncorrosive anaerobic designed primarily for use on aluminum, iron and steel flanged mating surfaces.

PREMIUM. Ideal for on-the-spot and emergency repairs, or when a conventional gasket is out of stock.

FILLS & SEALS. Fills gaps up to 0.050" (1.27 mm) and forms a flexible, solvent-resistant seal that will not tear or decay.

Sold in case packs of 12

Makes reliable 'formed-in-place' gaskets that resist cracking, shrinking and migrating

Coats pre-cut gaskets to increase reliability without fouling oxygen sensors