Permatex Ultra Black RTV Silicone Gasket Maker 9.5 oz PowerBead Can (6-pack) — Oil‑Resistant, Sensor‑Safe

Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker is a sensor-safe, fast-curing gasket sealant formulated for oil-exposed engine and drivetrain surfaces.

Built to meet OEM silicone performance, this Ultra Black RTV provides long-lasting flexibility and exceptional oil resistance across a wide temperature range. Its low-odor, non-corrosive formula bonds reliably to modern materials — including aluminum and high-tech plastics — and is designed to maintain torque and seal integrity where engine sensors and extended-warranty requirements matter.

How does this gasket maker stand up to oil and heat?

Ultra Black is engineered specifically for oil-exposed applications, resisting breakdown from engine and shop fluids while tolerating high operating temperatures. The product preserves elasticity so gaskets remain sealed under thermal cycling and vibration.

• Temperature range: -65°F to 500°F continuous, 550°F intermittent.
• Patented adhesion system that retains oil resistance and flexibility.
• Formulation resists engine oils, gear lubricants, and common shop chemicals.

Is this safe for modern engine sensors and warranty requirements?

The formula is sensor-safe and non-corrosive, reducing the risk of sensor damage or failure due to sealant interaction. Permatex developed Ultra Black to meet OEM specifications and support extended drivetrain warranty compliance when used per OEM guidelines.

• Low-odor, non-corrosive chemistry minimizes sensor contamination risks.
• OEM-specified performance suitable for dealer and service applications.
• Recommended for use where warranty compliance is required.

What applications and surfaces is it best for?

This RTV gasket maker is recommended for common automotive sealing points that need oil resistance and flexibility, including valve covers, oil pans, and transmission pans. It adheres well to metal and many modern composite materials used in today’s engines.

• Suggested uses: valve covers, oil pans, intake manifold end seals, timing covers, transmission pans.
• Bonds to aluminum, bi-metal alloys, and many high-tech plastics.
• Suitable for both production-level repairs and professional service bays.

How quickly does it cure and how is it applied?

Ultra Black is a fast-curing RTV that develops handling strength quickly while completing a full cure that delivers durable sealing properties. Application is straightforward from a 9.5 oz. PowerBead can — lay a continuous bead, allow skin-over, and reassemble according to part-specific cure times.

• PowerBead can dispenses a consistent bead for clean application.
• Fast skin-over time reduces downtime for many service tasks.
• Follow manufacturer cure times and part-specific recommendations for best results.

Who is this for: Permatex Ultra Black Maximum Oil Resistance RTV is aimed at professional technicians, dealership service departments, and experienced DIYers who need a reliable, sensor-safe gasket sealant for oil-exposed engine and drivetrain components. If you work with modern engine materials, require OEM-level performance, or need to meet warranty standards, this 6-pack of 9.5 oz. PowerBead cans provides a ready supply for frequent service tasks.