Ultra Black Gasket Maker 13oz Cartridge

The PERMATEX Ultra Black Gasket Maker 13oz Cartridge is a maximum oil-resistant RTV silicone sealant engineered for critical sealing applications in engines, transmissions, and fluid systems where hydrocarbon exposure and thermal cycling demand superior performance. This cartridge format delivers precision dispensing control and consistent bead placement—essential when sealing valve covers, oil pans, timing covers, and other high-vibration assemblies where gasket failure creates downtime and costly repairs.

The ultra-black formulation is optimized for maximum oil resistance, maintaining cure integrity and seal strength in constant exposure to engine oil, transmission fluid, and diesel fuel. The 13oz cartridge size is standard for caulking gun application, allowing controlled, gap-filling dispensing without waste. RTV (room-temperature-vulcanizing) silicone cures to a flexible elastomer at ambient conditions, accommodating metal expansion and contraction through thermal cycles while resisting adhesion failure. This eliminates the need for traditional cut gaskets and reduces assembly time on field repairs or builds.

Mechanics, engine builders, transmission technicians, and off-road equipment operators rely on PERMATEX sealants for critical fluid containment where conventional gaskets prove inadequate or impractical. The cartridge format suits both shop bench work and field repairs on patrol vehicles, tactical equipment, marine engines, and off-road platforms. A single cartridge covers multiple applications, making it cost-effective for maintenance kits and emergency repair supplies.

PERMATEX Ultra Black is recognized across automotive, marine, and industrial sectors as a standard-grade RTV sealant. The product is compatible with standard caulking guns and delivers reliable results across temperature ranges typical of small-engine and vehicle repair environments.