--- product_id: 157644995 title: "Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube" brand: "permatex" price: "€ 41.75" currency: EUR in_stock: true category: "Permatex" url: https://www.desertcart.sk/products/157644995-permatex-81878-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker store_origin: SK region: Slovakia --- # 8x flexibility vs cut gaskets Temp range -75°F to 700°F 3x oil resistance vs standard silicones Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube **Brand:** permatex **Price:** € 41.75 **Availability:** ✅ In Stock ## Summary > 🔥 Seal the deal with ultra copper power! 🛠️ ## Quick Answers - **What is this?** Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube by permatex - **How much does it cost?** € 41.75 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/157644995-permatex-81878-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker) ## Best For - permatex enthusiasts ## Why This Product - Trusted permatex brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Flexibility That Lasts:** Eight times more flexible than cut gaskets to absorb vibration and prevent leaks. - • **Sensor-Safe & Low Odor:** Non-corrosive formula protects sensitive engine sensors while maintaining a clean working environment. - • **Superior Oil Resistance:** Triple the oil resistance of conventional silicones keeps seals intact under pressure. - • **Unmatched Heat Endurance:** Handles extreme temps from -75°F to 700°F intermittent for peak engine performance. - • **Universal Fit for High-Performance Engines:** Ideal for turbocharged, 4-cylinder, and high-performance engines—perfect for exhaust manifolds, valve covers, and more. ## Overview Permatex 81878 Ultra Copper RTV Silicone Gasket Maker is a high-performance, copper-colored sealant designed for extreme temperature resistance (-75°F to 700°F intermittent). It offers 3x greater oil resistance and 8x more flexibility than traditional silicones, ensuring durable, sensor-safe seals for turbocharged and high-performance engines. Perfect for exhaust manifolds, valve covers, and other critical engine components, this 3 oz tube delivers professional-grade adhesion and vibration resistance with a low-odor, non-corrosive formula. ## Description Permatex Ultra Copper. For 4-cylinder, turbocharged or high-performance engines. The most advanced, high temperature RTV silicone gasket available. Sensor safe, low odor, noncorrosive. Superior adhesion. 3 times more oil resistant than conventional silicones; 8 times more flexible than cut gaskets. Temperature range -75 deg. F. to 700 deg. F. intermittent; resists auto and shop fluids and vibration. Suggested Applications : Exhaust manifolds/headers, valve covers, oil pans, timing covers, water pumps, thermostat housings. 3 oz tube. Carded. ## Features - Most Advanced, High Temp Rtv Silicone Gasket Available.Fit Type: Universal - Three Times More Oil Resistant Than Conventional Silicones; Eight Times More Flexible Than Cut Gaskets - Sensor-Safe, Low Odor, And Non-Corrosive With Superior Adhesion - Temperature Range -75F To 700F Intermittent ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002UEOPA | | Assembly Required | No | | Best Sellers Rank | #35,453 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #45 in Fillers, Adhesives & Sealants | | Brand | Permatex | | Colour | Copper | | Customer Reviews | 4.7 4.7 out of 5 stars (3,510) | | Date First Available | 3 August 2012 | | Exterior | Painted | | Generic Name | Gasket | | Item Dimensions LxWxH | 20.3 x 10.2 x 5.1 Centimeters | | Item Weight | 85 g | | Item model number | 81878 | | Manufacturer | Permatex | | Manufacturer Part Number | 81878 | | Material | Copper | | Model | Permatex 81878 | | Net Quantity | 3.0 Ounce | | OEM Part Number | PMT81878 | | Product Dimensions | 20.32 x 10.16 x 5.08 cm; 85 g | | Size | 3 oz | | Special Features | Forms a superior bond on oil contaminated metals and maintains outstanding oil resistance | | Water Resistance | Waterproof | ## Product Details - **Brand:** Permatex - **Colour:** Copper - **Full Cure Time:** 24 Hours - **Item Weight:** 85 Grams - **Liquid Volume:** 3000 Millilitres ## Images ![Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube - Image 1](https://m.media-amazon.com/images/I/41VG2wVHcOL.jpg) ![Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube - Image 2](https://m.media-amazon.com/images/I/81freAdVPGL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can we apply this gasket maker for sealing motorcycle crankcase and cylinder block?** A: Yes, this works well for sealing the motorcycle crankcase and cylinder block. Thanks, Team UrbanWare ## Frequently Bought Together - Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube - J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz - Permatex 80335 Muffler and Tailpipe Sealer, 3 oz., Plastic, 1 Count (Pack of 1) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/157644995-permatex-81878-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker](https://www.desertcart.sk/products/157644995-permatex-81878-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-11-06*