Ultra Red Gasket Maker 13 oz Cartridge

The Ultra Red Gasket Maker 13 oz Cartridge by PERMATEX is an essential sealant for engine builders, mechanics, and automotive enthusiasts performing gasket replacement, engine rebuilds, or custom modifications. This product fills a critical role in modern engine work—providing a reliable, non-hardening anaerobic sealant that bonds and seals gasket surfaces without requiring the gasket to cure solid, allowing for future disassembly when needed. Whether you're performing a full engine tear-down, replacing valve cover gaskets, or sealing oil pan flanges, this cartridge delivers consistent performance across aluminum, cast iron, and composite surfaces.

PERMATEX's Ultra Red formulation utilizes anaerobic chemistry—meaning the sealant cures only in the absence of air and presence of metal, creating a flexible elastomer that resists oil, coolant, fuel, and vibration without becoming brittle over time. The 13 oz cartridge format fits standard caulking guns, enabling precise, controlled application along gasket surfaces and fastener perimeters. The product withstands typical engine bay temperatures up to 300°F continuously, with excursion tolerance to 400°F, making it suitable for both street and modified engines, including forced induction builds. This medium-strength formulation allows disassembly with hand tools after full cure (typically 24 hours), unlike permanent threadlockers, giving you flexibility for future service work.

Mechanics and engine builders rely on this sealant for oil pan gaskets, timing cover seals, intake manifold flanges, and any non-critical gasket joint where long-term removability matters. It's particularly valued in high-performance and turbocharged applications where thermal cycling demands flexible sealing without degradation. The cartridge format minimizes waste compared to tubes, and the 13 oz size covers multiple gasket jobs on a single engine or several smaller projects. Always ensure surfaces are clean and dry before application, and allow full cure time before starting the engine to achieve maximum seal integrity and performance.