Permatex Ultra Black RTV Silicone Gasket Maker 9.5 oz PowerBead — Oil-Resistant, Sensor-Safe Sealant

Permatex Ultra Black 85080 is a sensor-safe, oil-resistant RTV silicone gasket maker that cures quickly to form flexible, durable gaskets for powertrain and engine sealing applications.

When you need a dependable gasket solution that bonds to oily surfaces and tolerates modern vehicle fluids and temperatures, this 9.5 oz PowerBead can delivers a professional-grade, OEM-specified silicone sealant. Formulated to meet dealership warranty requirements and engineered for high flexibility, Ultra Black replaces pre-formed gaskets on many engine and drivetrain components while providing long-term resistance to oil, transmission fluid, gear lube and coolants.

How does Ultra Black handle oily or contaminated surfaces?

Ultra Black uses a patented adhesion system and a sensor-safe, low-odor formula to adhere to surfaces that may have residual oil. While best results come from cleaning and degreasing the joint, the product is designed to create reliable seals where residual contaminants remain.

• Patented adhesion system improves bond to metal and high-tech plastics.
• Sensor-safe and non-corrosive chemistry avoids damage to nearby electronics or sensors.
• Low odor makes it easier to work with in enclosed garages.
• Eliminates need for some pre-formed gaskets on compatible joints.

What temperature range and fluids can this RTV silicone resist?

Ultra Black withstands a wide operating range, from extreme cold to intermittent high heat, and resists common automotive fluids. That makes it suitable for many engine and drivetrain sealing points that encounter thermal cycling and chemical exposure.

• Temperature range: -65°F to 500°F (-54°C to 260°C) intermittent.
• Resistant to engine oil, transmission fluid, gear lube and coolant.
• Maintains flexibility to prevent cracking under vibration and thermal expansion.
• Suitable for applications exposed to shop fluids and occasional chemical contact.

Which parts and repairs is this gasket maker best suited for?

Permatex Ultra Black is formulated for common engine and drivetrain joints where a formed gasket can be replaced by a reliable silicone seal. Its flexibility and fluid resistance make it a practical choice for both routine maintenance and component replacement jobs.

• Valve covers and oil pans — creates leak-resistant seals while tolerating oil exposure.
• Intake manifold end seals and timing covers — bonds to diverse materials including aluminum.
• Differential covers and other drivetrain housings — resists gear lube and vibration.
• Works with newer component materials such as bimetal alloys and advanced plastics.

How does this product support warranty and dealership requirements?

Ultra Black meets OE silicone gasket performance specifications and is OEM specified for applications where dealer warranty compliance is required. Using an OEM-specified RTV gasket maker helps preserve extended drivetrain warranties when a formed gasket is replaced or unavailable.

• Formulated to meet performance specs of original equipment silicone gaskets.
• OEM-specified for warranty-compliant repairs and service applications.
• Offers excellent torque retention for bolted flange joints.
• Sensor-safe chemistry avoids negative interactions with vehicle electronics.

Who is this product for? Professional mechanics, service shops, restoration specialists and experienced DIYers who need a robust, engine- and drivetrain-safe gasket maker will find Permatex Ultra Black 85080 useful. It’s aimed at anyone repairing valve covers, oil pans, timing covers, intake manifold ends or differential housings — particularly where OEM-level performance, warranty compliance and resistance to modern fluids and temperatures are required. For best results, follow surface prep recommendations and manufacturer instructions when replacing gaskets or sealing joints.