Liquid-O-Ring HT-1800 Pure Copper Anti-Seize Lubricant — 8 oz, 1800°F High-Temp Protection for Exhaust & Turbo

Liquid-O-Ring HT-1800 is a pure copper anti-seize lubricant formulated to protect high-heat fasteners up to 1800°F and prevent seizing, galling, and corrosion.

When bolts, studs, and threaded connections face extreme heat, pressure, salt, or corrosive environments, ordinary greases fail. Liquid-O-Ring HT-1800 offers a heavy-duty copper-rich compound designed for heavy machinery, automotive exhaust systems, marine hardware, and industrial equipment that must be disassembled reliably after long service at very high temperatures.

How does HT-1800 protect fasteners under high temperature?

HT-1800 deposits a dense copper barrier between metal surfaces so threads and contact points avoid direct metal-to-metal wear at elevated temperatures. Its formulation is rated to withstand continuous exposure up to 1800°F, so the protective film stays intact where lesser products oxidize or burn off.

• Pure copper concentrate for a resilient metallic film
• 1800°F thermal tolerance for exhaust and turbo applications
• Resists breakdown from heat cycling and thermal shock

What fasteners and applications is this anti-seize best for?

Use HT-1800 anywhere heat, pressure, or corrosive conditions make future disassembly difficult. It’s ideal on exhaust manifold bolts, turbocharger and header studs, spark plugs, marine fittings, heavy equipment, and flanges exposed to salt or chemicals.

• Spark plugs, exhaust bolts, manifolds, and header studs
• Marine hardware, flanges, and salted or corrosive environments
• Heavy machinery, farm equipment, and high-torque connections

Is HT-1800 safe to use on different metals and surfaces?

HT-1800 is formulated without lead, zinc, or graphite so it’s suitable for aluminum, stainless steel, cast iron, and titanium. The thick consistency stays in place on vertical or hot surfaces and resists solvents, acids, oils, and salt water without attacking base metals.

• Lead-free, zinc-free, and graphite-free for broad metal compatibility
• Thick paste that won’t run or thin on hot/vertical parts
• Brush-top can for accurate, low-mess application—even on oily parts

How does HT-1800 make maintenance and repairs easier?

By preventing thread galling, seizure, and corrosive locking, HT-1800 helps fasteners break free cleanly after long service lives. That reduces time spent cutting, heating, or chasing threads and minimizes the risk of damaging components during disassembly.

• Reduces labor and avoids destructive removal techniques
• Maintains clean, serviceable threads after prolonged heat exposure
• Packaged for controlled application to limit waste and mess

Who is this for? Liquid-O-Ring HT-1800 is aimed at professional mechanics, marine technicians, fabricators, heavy equipment operators, and serious DIYers who work on hot-running engines, turbo systems, exhaust components, and corrosion-prone assemblies. If you need a dependable, high-temperature anti-seize that stays put and lets hardware come apart after months or years of extreme conditions, this product is built for those demanding tasks.