Loctite Anti-Seize Paste 8 oz Black — High-Temp Protection to 2400°F, Corrosion-Resistant

Loctite 299175 Paste Anti-Seize is a black, high-temperature lubricant designed to prevent galling, seizing, and corrosion on threaded and mated metal parts up to 2400°F.

This heavy-duty anti-seize paste from Loctite delivers long-lasting protection where metal-to-metal contact, extreme heat, or corrosive environments threaten fasteners and components. Formulated for temperatures from -20°F to 2400°F and supplied in an 8 oz can, it creates a barrier that eases assembly and future disassembly while resisting water and many corrosive influences. The thick, tacky black paste stays in place during handling and when exposed to thermal cycling.

How does this anti-seize protect fasteners at extreme temperatures?

The proprietary formulation remains stable across a broad thermal range, forming a heat-tolerant layer that prevents welding or cold welding between metal surfaces. At elevated temperatures the paste dries into a lubricious film that reduces friction and metal-to-metal contact.

• Operates from -20°F to 2400°F for many industrial applications
• Black paste resists runoff and stays where applied
• Prevents galling, seizing, and thread damage under heat

Where should I apply Loctite 299175 on equipment and assemblies?

Apply to threaded components, flanges, studs, and mating surfaces that face high heat, saltwater, or corrosive exposure. It’s suitable for both stainless and alloy steels, and for locations where future serviceability is important.

• Threads of bolts, studs and pipe fittings to ease removal
• Flanges and mounting faces subject to thermal cycling
• Fasteners exposed to saltwater, boiler environments, and exhaust systems

How do I use and store the 8 oz can for best results?

Clean surfaces of grease, scale, and debris before applying a thin, even coat to the contact area. Reapply during major service intervals if components are exposed to abrasive conditions or heavy corrosion.

• Shake or stir if necessary, then brush or smear onto threads and contact faces
• Allow heated parts to cure into a dry film under service temperatures
• Store capped in a cool, dry place away from ignition sources

Will this paste work on all metals and in marine environments?

Loctite 299175 is formulated to protect a wide variety of metals and provides resistance against galvanic corrosion, making it compatible with mixed-metal assemblies. It performs well in damp and marine conditions, though specific chemical exposures should be checked against material compatibility guidelines.

• Suitable for stainless steel, carbon steel, and many alloys
• Resistant to moisture and helps prevent galvanic corrosion on contact surfaces
• Verify compatibility for aggressive chemical environments before use

Who is this for: Loctite 299175 Paste Anti-Seize is intended for mechanics, maintenance technicians, fabricators, marine crews, and industrial operators who need reliable, high-temperature protection for threaded assemblies and mating metal surfaces. It’s useful on engines, exhaust systems, boilers, flange connections, and any service where heat, corrosion, or difficult disassembly is a concern. Packaged in an 8 oz can and made in the United States, it suits both professional shops and serious DIYers who expect durable anti-seize performance under demanding conditions.