Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker – 3.35 oz Tube (Pack of 12)

Overview

Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker is a fast-curing, sensor-safe sealant designed to help gaskets perform under challenging conditions. Its low-odor, non-corrosive formula bonds with confidence while preserving flexibility, even as engines experience heat, vibration, and fluid exposure. The patented adhesion system works with a range of materials, aiming to deliver a durable seal that suits both OEM production and service work.

Key benefits

• Fast-curing, sensor-safe, low odor, and non-corrosive chemistry for easier handling and fewer fumes during application.
• Maintains high flexibility and strong oil resistance thanks to a patented adhesion system designed to endure engine movement.
• OEM specified and aligned with performance specs of OE silicone gaskets, supporting compatibility with modern engines.
• Supports extended drivetrain warranty requirements by providing durable, long-lasting seals.
• Wide operating temperature range from -65°F up to 550°F intermittently, tolerating heat cycles and cold starts.
• Resistant to common auto and shop fluids and capable of withstanding engine vibration for reliable sealing.

Suggested applications

• Valve covers
• Oil pans
• Intake manifold end seals
• Timing covers
• Transmission pans

Real-world use and considerations

In workshop settings, technicians value how the formula reduces odors and remains flexible as components heat and cool. The adhesive system helps seals stay bonded across aluminum and bi-metal assemblies, making it a versatile option for a range of engine configurations and service scenarios.

Storage and handling: Keep in a cool, dry place with the container tightly closed to preserve performance. The 3.35 oz tube size offers convenient portability for both quick fixes and full-service jobs.

Why customers choose Permatex

Permatex combines OEM-focused engineering with practical service-grade solutions. This Ultra Black variant emphasizes oil resistance and reliable adhesion, supporting seals across modern engines that mix materials and sensors. It provides a robust, OEM-inspired option for both production work and on-vehicle service tasks.