CRC Maniseal Exhaust Cement Brown 145g High Temp Sealant for Mufflers and Tailpipes DIY Auto Repair

CRC Maniseal Exhaust Cement Brown Tube 145g is a sodium silicate–based sealer specially formulated for mufflers and tailpipes that endures high temperatures. It expands and sets when heated, delivering a reliable, gas-tight seal against carbon monoxide and other noxious fumes.

This brown sealant is designed to bridge gaps and imperfections in exhaust clamping areas, providing a durable joint without the need for a traditional gasket. It’s asbestos-free, cleans up with water, and is ready to use straight from the tube—no mixing required.

Key benefits

• High-temperature resistance up to 300 deg
• Expands and sets with heat to maintain a lasting seal
• Seals out poisonous fumes from exhaust leaks
• Contains no asbestos for safer handling
• Water-cleanup and ready-to-use straight from the tube
• Brown color tailored for automotive exhaust aesthetics and compatibility
• Ideal for mufflers, tailpipes, joints, and catalytic converters

Where to use

• Manifold: In some modern vehicles without manifold gaskets, CRC Maniseal can take the place of a gasket.
• Exhaust flange: Spread between the faces and into the 'V' of the clamp to create a highly satisfactory seal.
• Muffler: When renewing the muffler and tightening, applying CRC Maniseal beforehand helps prevent leaks and saves time.
• Industrial use: Kiln repairs — thoroughly wet the damaged area, force CRC Maniseal into cracks and gaps, and smooth over with fingers.

How to apply (practical tips)

• Ensure surfaces are clean, dry, and free of oil or grease before applying.
• Apply an even bead of CRC Maniseal along joint faces or into the clamp’s mating surfaces for a continuous seal.
• Assemble the exhaust components and tighten as you normally would; the cement will expand and set as the system heats during operation.
• For muffler replacements, smear a thin layer over the pipes before fitting to reduce the chance of leaks and subsequent rework.

Who this is for

• DIY enthusiasts tackling exhaust repairs and replacements
• Professional mechanics and muffler specialists seeking a reliable, heat-resistant sealant
• Workshops involved in exhaust system installations and occasional kiln or industrial repair work

Choose CRC Maniseal Exhaust Cement Brown Tube 145g for a ready-to-use, heat-tolerant seal that simplifies exhaust repairs and helps keep fumes where they belong—out of your cabin and out of your life.