Permatex 82180 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, Sensor Safe And Non-Corrosive, For High Flex And Oil Resistant Applications 3 oz 3 Fl. Oz. Ultra Black
Overview
Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker (3 fl. oz.) is a sensor-safe, non-corrosive RTV designed specifically for oil-exposed engine seams and components. It cures to a flexible, resilient gasket that tolerates vibration and thermal cycling, making it a practical choice for valve covers, oil pans, timing covers and other oil-wetted joints. The formula resists common automotive and shop fluids, retains torque, and is OEM-specified to meet the performance of factory silicone gaskets. Because it’s low-odor and formulated for modern materials like aluminum, bi-metal alloys and high-tech plastics, it’s aimed at both DIY mechanics and professional technicians who need a reliable, oil-resistant seal in compact 3 oz tubes for small-to-medium jobs.
Key Features
- Size and color: 3 fl. oz. (3 oz) tube, Ultra Black color for dark engine seams.
- Temperature range: serviceable from -65°F to 500°F (intermittent high-temp exposure).
- Sensor-safe and non-corrosive: formulated to avoid damaging O2 sensors and electronics.
- Patented adhesion system: engineered to meet OEM silicone gasket performance and torque retention.
- RTV silicone cure: moisture-cures at room temperature to a flexible elastomeric gasket; low odor.
Pros & Cons
Pros
- Sensor-safe formulation — safe around oxygen sensors and engine electronics.
- High oil resistance and compatibility with automotive fluids for engine use.
- Wide temperature tolerance (‑65°F to 500°F intermittent) for hot engine environments.
- Cures to a flexible gasket for vibration resistance and good torque retention.
- Low odor, non-corrosive formula suitable for modern metals and plastics.
Cons
- 3 fl. oz. tube is small — may be insufficient for larger jobs or multiple gaskets.
- Not ideal for continuous gasoline/fuel immersion or fuel system seals.
- Silicone surfaces are difficult to paint and may not bond to every substrate without prep.
- Cure time and performance depend on bead thickness and humidity; thinner beads cure faster.
Recommendations
- DIY mechanics sealing valve covers, timing covers, small oil pans or thermostat housings.
- Professional shops needing a sensor-safe gasket maker for oil-exposed engine components.
- Restorers working with aluminum and bi-metal alloy parts where non-corrosive sealing is required.
- Small engine and accessory repairs where flexibility and oil resistance are more important than rigid bonding.
Price Comparison & Trends
In the last 30 days, the Permatex 82180 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker has shown significant price variance across retailers. Currently, Walmart offers the lowest price at $9.69, while Ace Hardware and Tractor Supply feature higher prices, peaking at $14.99. This indicates a potential savings of $5.30 for consumers willing to shop around. Over the last 90 days, the price at Walmart has remained stable, suggesting that now may be an ideal time to purchase before any potential price increases. Given the competitive pricing landscape, consumers are encouraged to act quickly to capitalize on these savings before they diminish.
Buy now to take advantage of the current lowest price before it potentially increases.
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