Permatex Anaerobic Gasket Maker 300 ml Cartridge - Durable Seal

In this review of the Permatex Anaerobic Gasket Maker, the bottom line is straightforward: this product is best for DIY mechanics and professional technicians who need a reliable, on-the-spot gasketing solution when a conventional gasket is unavailable. The reviewer found the cartridge especially useful for aluminum and steel flanged surfaces where a solvent-resistant, tear-proof seal is required. Its ability to fill gaps up to.015 in and to allow parts to disassemble after extended service makes it a practical choice for emergency repairs and routine maintenance.

Key Features

• Flange compatibility: Formulated primarily for use on aluminum, iron, and steel flanged mating surfaces, providing a dependable bond on common engine materials.
• Gap filling: Fills gaps up to.015 in, making it useful where a thin irregularity would otherwise cause leaks.
• Solvent-resistant seal: Cures to a solvent-resistant gasket that resists tearing and decay during regular service life.
• Easy disassembly: Parts disassemble easily even after extended service and old gasket material can be removed with a simple putty knife.
• Versatile applications: Suggested for water pumps, thermostat housings, transmission pans and case covers, transaxle casings, and o-ring replacement for broad garage utility.

Who It's For

This gasket maker suits home mechanics, restoration shops, and fleet technicians who need a reliable anaerobic seal for aluminum, iron, and steel flanges. It is especially helpful in emergency repairs or when a stock gasket is missing and for users who value a seal that will remain serviceable without crumbling or tearing.

Those who should look elsewhere include users needing to fill larger gaps than.015 in or those working exclusively with nonmetal substrates not recommended by the manufacturer. Also, if a preformed OEM gasket is available and preferred for strict factory tolerances, a molded gasket may be the better choice.

Pros & Cons

Pros

• High sealability on common engine flanges, reducing leak risk in water jackets and transmission cases.
• Durable, solvent-resistant cured material that resists tearing and decay over time.
• Easy removal of old material and straightforward disassembly after extended service, saving labor time.
• Good value for repairing a variety of components where OEM gaskets are unavailable.

Cons

• Not suitable for gaps larger than.015 in, so it is limited to thin flange irregularities.
• Best performance is on aluminum, iron, and steel flanges; performance on other substrates is not specified.

Specifications

Product name	Permatex Anaerobic Gasket Maker
Volume	300 ml cartridge
Color	Red
Maximum gap fill	.015 in
Primary materials	Designed for aluminum, iron, and steel flanged surfaces
Cured properties	Solvent-resistant, non-corrosive seal that will not tear or decay
Suggested applications	Water pumps, thermostat housings, transmission pans, case covers, transaxle casings, o-ring replacement

Our Verdict

The Permatex Anaerobic Gasket Maker is a practical choice for anyone needing a reliable, quick gasketing solution on metal flanges. It offers strong leak resistance and easy disassembly while filling small gaps up to.015 in, making it good value for garage repairs and emergency fixes. Professionals and experienced DIYers will appreciate its durability and versatility across engine and transmission applications.

Frequently Asked Questions

Can this gasket maker be used on plastic or composite housings?
Its formulation is specified for aluminum, iron, and steel flanged surfaces; compatibility with plastics or composites is not detailed and is not recommended without testing.

How large a gap can it fill effectively?
The product is intended to fill gaps up to.015 in; larger gaps should use a different sealing method or a thicker gasket.

Will the sealed parts come apart later if service is needed?
Yes, parts are designed to disassemble easily even after extended service, and old gasket material can be removed with a putty knife.