Ultra Copper Gasket Maker 3oz Carded Tube

Permatex Ultra Copper Gasket Maker 3oz Carded Tube is a high-temperature RTV silicone sealant engineered for critical engine and mechanical applications where copper-reinforced reliability is essential. This gasket maker delivers maximum temperature performance and dependable sealing for operators maintaining tactical vehicles, field equipment, and industrial machinery where thermal stress demands exceed standard sealant capabilities.

The 3-ounce carded tube format provides controlled dispensing and precise application for engine block sealing, valve cover gaskets, oil pan work, and transmission housing repairs. Permatex's copper-infused formulation withstands sustained high temperatures while maintaining flexible adhesion to metal substrates, preventing blowout under thermal cycling. The RTV silicone base creates a durable, flexible seal that accommodates the expansion and contraction cycles common in high-performance and diesel engine environments where static gaskets fail.

Technicians and equipment maintainers working on small-block, big-block, and diesel platforms rely on this sealant for emergency field repairs, routine maintenance, and permanent shop-level applications. The compact 3oz tube format fits duty bags and mobile tool kits, making it accessible for rapid response maintenance on patrol vehicles, generators, pumps, and engine-driven equipment in demanding environments. Cured seals resist oil, coolant, and fuel exposure—critical for automotive and industrial assembly work.

RTV silicone sealants like this Permatex formulation are industry standard for applications where traditional cork or rubber gaskets cannot tolerate temperature extremes or require flexible gap-filling performance. The copper additive enhances thermal conductivity and heat dissipation, making it preferred for engine sealing where temperature margins are tight and reliability is non-negotiable.