Permatex Gasket Sealant

Permatex Gasket Sealants: Engineered for Every Sealing Application

Permatex has been a cornerstone of automotive chemical technology since 1909, and their lineup of gasket sealants is one of the clearest expressions of that legacy. Where generic sealants take a one-size-fits-all approach, Permatex engineers distinct formulations for distinct jobs — whether you need a permanent, hard-setting bond on rigid flanges or a pliable, non-hardening compound that allows for repeated disassembly.

A Formula for Every Job

At the heart of the Permatex gasket sealant range is the iconic Form-A-Gasket series. Form-A-Gasket No. 1 is a fast-drying, hard-setting formula designed for sealing rigid materials, flanges, freeze plugs, and threaded connections where permanent assembly is the goal — and it resists common shop fluids and fuels throughout. For applications where you anticipate future disassembly, Form-A-Gasket No. 2 takes a different approach: a slow-drying, non-hardening formulation that remains flexible over time and is even approved for aviation as well as automotive use.

When the challenge is keeping a large or awkward gasket positioned during assembly, Permatex Super High Tack and High Tack Gasket Sealant step in. The High Tack formula is an all-purpose, fast-drying sealant that dries to a highly tacky, non-brittle film, making it a reliable choice for compressors, diesel engines, and other demanding environments. Super High Tack is purpose-built as a non-hardening compound that holds large gaskets firmly in position while enabling easy disassembly later.

For fuel-system and high-performance applications, PermaShield brings a polyester urethane-based chemistry to the table. This compound is specially formulated for superior fluid resistance — it withstands extreme temperature changes without hardening, resists oil, gasoline, ethanol, water, and antifreeze, and operates across a wide temperature range. Its non-setting character means it stays tacky even under rapid thermal cycling, making it equally useful as a gasket maker or a gasket dressing.

Resin-Based Technology in Hardening and Non-Hardening Varieties

Across the product line, Permatex gasket sealants rely on resin-based chemistry available in both hardening and non-hardening formulas — a deliberate design choice that gives technicians precise control over the final assembly. The right choice depends on the substrate, the fluid being sealed, the operating temperature, and whether the joint will ever need to be reopened. Permatex's depth of product range means there is a verified, tested formula for virtually every scenario a professional or DIY mechanic will encounter.

Trusted by Professionals and Enthusiasts Alike

Permatex products have been used in workshops, garages, service stations, and at racetracks around the world for over a century. The company's ongoing partnerships with automakers, parts suppliers, and aftermarket groups ensure that each new formulation meets real-world demands. With 17 gasket sealant SKUs available, the Permatex lineup covers everything from routine maintenance to high-performance builds. Browse the full Permatex brand catalog or explore the entire Gasket Sealant category to find the right compound for your application.