10 Best Exhaust Sealant of August 2025

• Effective for sealing exhaust joints subject to elevated temperatures
• Ideal for "out-of-round" muffler and pipe connections
• Cures in minutes
• New Walker accessories help to ensure effective exhaust repairs
• Walker supplies all of the accessories you need to do the complete exhaust job

Walker

• Fast-drying, metallic copper spray adhesive/sealant helps to dissipate heat, prevents gasket burnout, and improves heat transfer
• Fills minor surface irregularities, fills hot spots and surface imperfections
• Resists all types of automotive fluids, especially gasoline
• Temperature Range: -50°F to 500°F (-45°C to 260°C)
• Suggested Applications: Cylinder head gaskets, exhaust manifold gaskets, and other high temperature applications

Permatex

• 100X STRONGER THAN DUCT TAPE: Fiber Fix Heat Wrap is the solution to all your breaks, tears and cracks. 100 times stronger than duct tape and as strong as steel for a durable and dependable repair.
• BRING ON THE HEAT: The FiberFix Heat Wrap hardens like steel and can withstand temperatures up to 850 degrees Fahrenheit. A great solution for automotive repairs and cracked pipes.
• FIX IT YOURSELF: Simply slip on your gloves, soak FiberFix in water, apply to any surface needing repair, in as little as an hour your repair is as strong as ever. "Do it yourself" has never been easier or more cost effective.
• REPAIR ANYTHING ANYTIME ANYWHERE: If things like to break and you want to unbreak them, the Heat Wrap is just the thing to fix all your household repairs such as cracked pipes and furnace leaks.
• SATURDAY SAVED: Includes: 1 Roll 2" heat wrap. No one wants to spend their Saturday all day in a store, especially when it involves spending hours looking for replacement parts. Use the FiberFix Heat Wrap and save your Saturday!

FIBERFIX

• Sensor-safe, low odor, and non-corrosive.
• Maximum vibration resistance, with outstanding resistance to oils, cooling fluids, and shop fluids. 15% more flexible than Ultra grey.
• Maximum temperature resistance: -65F to 700f(-54 DegreeC to 371 DegreeC) intermittent. 40% higher Temp. Than Ultra grey.
• The most Advanced, high Temp RTV silicone gasket maker Available.
• Includes 2 nozzles.

Permatex

• Lasting protection for any hot surface up to 1500 degrees Fahrenheit
• Penetrates, seals, protects and prolongs the lifespan of exhaust wrap
• Works equally well on exhaust headers, pipes, engine blocks, and other applications where coatings are required
• Protection from abrasions, hot oil spills, and road grime
• Recommended for use with DEI non-Titanium exhaust wraps

Design Engineering

• 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

J-B Weld

• JB WELD EXTREME HEAT: Is formulated for repairs to iron, steel and metal in high temperature environments-2400°F / 1300°C. Non-flammable, it contains no solvents or Volatile Organic Compounds (VOCs).
• THE ORIGINAL COLD WELD: JB Weld was developed as an alternative to torch welding. Designed to be effective in extreme environments, once it sets, it creates a permanent bond stronger than steel.
• SIMPLE TO USE: When fully cured, this metallic compound can be drilled, machined or sanded. It is great for repairing cracks, small gaps, seam connections or holes.
• VERSATILE & DEPENDABLE: Ideal for repair work on : exhaust manifolds, pipe connections, mufflers, catalytic converters, outdoor grills, fire boxes, gas and commercial furnaces and water heaters.
• 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.

J-B Weld

• Effective for sealing exhaust joints subject to elevated temperatures
• Ideal for "out-of-round" muffler and pipe connections
• Cures in minutes
• New Walker accessories help to ensure effective exhaust repairs
• Walker supplies all of the accessories you need to do the complete exhaust job

Dynomax

• Most advanced, high temp RTV silicone gasket available
• Three times more oil resistant than conventional silicones; eight times more flexible than cut gaskets
• Sensor-safe, low odor, and non-corrosive with superior adhesion
• Temperature range -75F to 700F intermittent
• Suggested Applications: Exhaust manifolds/headers, valve covers, oil pans, timing covers, water pumps, thermostat housings

Permatex

• Seals holes and leaks in mufflers, tailpipes and around joints
• Makes new installations more secure
• Waterproof, non-shrinking paste formula; shock resistant
• Temperature Range: up to 2000°F (1000°C)
• Suggested Applications: Mufflers, tailpipes, joints, and catalytic converters; exhaust system must be cool before applying

Permatex