The 5 Best Permatex joint compounds (2023 reviews)

If you are searching for a long-standing compound for your daily usage, you cannot go wrong with this product. It's definitely a very firm gasket maker. It is compatible with oil, water, differential and transmission oil, the key to all applications is to have the surface absolutely clean with solvent. It does not have much strength, mostly a filler as you can easily peal it off after drying. It can be used on high torque and vibration applications such as valve covers, water pump, intake manifold and seals your thermostat housings.

This is ultra high temp, it's intended for exhausts and turbochargers. It is quite forgiving to work with at 80F+ temperatures. It is perfect for motorcycle casees.

Why We Like This:

Leaks and housing is made from aluminum
Works perfectly on engine timing covers
New and hot release

Best For Plastic: Permatex joint compound

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate compound. The product is exactly that - it's a simple product that hits all the right notes. This is a Gasket sealer. It is designed to coat, seal and repair most gaskets including felt, paper, rubber and composition type gaskets. It is best with thin gaskets like paper. It resists oil and coolant equally well. When you pull out the applicator which is attached to the top, it brings an enormous proportion of the contents of the small bottle with it. Even when it cures it remains somewhat pliable which gives it excellent sealing performance.

This stuff is fantastic for paper and cork gaskets, even the cheapest gaskets seal and are held in place. It is used for many years on farm and industrial equipment.

Why We Like This:

Seals all common gasketing materials in low temperature and low pressure applications
Seals metal gaskets and threaded connections for light duty service
Doesn't fully harden so removal is no problem
Useful when sealing threads in contact with oil

Best With Or without gasket paper: Permatex joint compound

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The permatex joint compound might be a relatively new release, but it's still nothing short of impressive this year, thanks to multiple price cuts and added new features over the past few iterations. This product works in conjunction with a gasket. It can be used on generators, lawn mowers, trash pumps, compressors, appliances and general house applications where a seal is required. It's also great for sealing up engine parts.

This is aviation grade (use on planes) sealant. It is good, will seal the tiny little nooks you might get a seepage. The Thread Lock is designed for fittings that vibrate loose. It is great for use on freeze plugs. It's great for use on freeze plugs.

Why We Like This:

Excellent product for sealing the gas key on ar platform bolt carriers
Works great on an type fuel fittings
Great for flanges or where you don't wanna deal with gasket removal

Best For aluminum: Permatex Great Sealer

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate compound. The product is exactly that - it's a simple product that hits all the right notes. This sealer makes new installations more secure, is shock resistant, high temperature resistant, and is waterproof for all weather conditions. It can be used on butt clamp exhaust installation. This is more of a gasket making, type of material. It is used for insulation to sift through. It is great for extra sealing when replacing cats. This combination completely sealed the 2 pieces back together. It can be a bit brittle under certain conditions. It is nice to have on hand to seal a minor exhaust leak at a slip joint.

Why We Like This:

Handles the heat and vibration without cracking
Great product for small exhaust leaks at a slip joint
More exhaust leak and really easy to apply

Best For Black pipe: Permatex joint compound

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Compared with other products by Permatex, the permatex joint compound has a convenient design.

Why We Like This:

Lubricates and seals threaded joints on water, oil and fuel lines
Good brand reputation