--- product_id: 50081863 title: "S/S Permatex - Ultra Copper - RTV Silicone Gasket Maker - Exhausts to 700oF - 85g" brand: "permatex" price: "132.91 DT" currency: TND in_stock: true category: "Permatex" url: https://www.desertcart.tn/products/50081863-s-s-permatex-ultra-copper-rtv-silicone-gasket-maker-exhausts store_origin: TN region: Tunisia --- # Withstands up to 700°F 8x more flexible than cut joints 3x more oil-resistant S/S Permatex - Ultra Copper - RTV Silicone Gasket Maker - Exhausts to 700oF - 85g **Brand:** permatex **Price:** 132.91 DT **Availability:** ✅ In Stock ## Summary > 🔥 Seal the deal with Ultra Copper – where performance meets precision! ## Quick Answers - **What is this?** S/S Permatex - Ultra Copper - RTV Silicone Gasket Maker - Exhausts to 700oF - 85g by permatex - **How much does it cost?** 132.91 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/50081863-s-s-permatex-ultra-copper-rtv-silicone-gasket-maker-exhausts) ## 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 - • **Extreme Heat Defense:** Handles engine temps up to 700°F intermittent—perfect for turbocharged and high-performance rides. - • **Versatile & Reliable:** Ideal for OEM specs and modern materials like aluminum and bimetallic alloys—trusted by pros and enthusiasts alike. - • **Flexibility That Lasts:** Eight times more flexible than traditional cut joints, ensuring a durable, vibration-resistant seal. - • **Sensor-Safe & Low Odor:** Formulated to protect sensitive engine sensors while keeping your workspace fresh and non-corrosive. - • **Unmatched Oil Resistance:** Three times tougher against oil than standard silicones, keeping your gasket intact under pressure. ## Overview Permatex Ultra Copper RTV Silicone Gasket Maker is a high-performance, sensor-safe sealant designed for extreme temperatures up to 700°F. It offers superior oil resistance, exceptional flexibility, and strong adhesion, making it the go-to choice for turbocharged, high-performance, and OEM engines. Trusted by professionals for its durability against vibrations and compatibility with advanced engine materials. ## Description Permatex Ultra Copper Maximum Temperature RTV Silicket Gasket Maker is the most advanced and high temperature RTV silicone gasket available. Three times more oil-resistant than conventional silicones and eight times more flexible than cut joints, it is sensor safe, has low odor, and is non-corrosive with superior adhesion. Higher operating temperatures for 4-cylinder, turbocharged or high-performance and OEM-specified engines, with a temperature range of -75 degrees Fahrenheit to 700 degrees Fahrenheit intermittent. It also resists auto and workshop fluids and vibrations. These gasket manufacturers offer significant performance advantages, excellent torque retention and high temperature properties and safe sensors. Extended warranties, engine sensors, and new component materials, such as aluminum, bimetallic alloys, and high-tech plastics, have created the need for superior RTV silicone gasket manufacturers in OEM production and service applications. Permatex always has the right gasket manufacturer for your application. ## Features - Causes serious eye irritation. - May cause an allergic skin reaction. - Suspected of causing cancer. - Most advanced, high temp RTV silicone gasket available ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002UEOPA | | Best Sellers Rank | 2,815 in Automotive ( See Top 100 in Automotive ) 40 in Fillers, Adhesives & Sealants | | Brand | Permatex | | Colour | bronze | | Customer Reviews | 4.7 4.7 out of 5 stars (3,354) | | Date First Available | 16 Aug. 2010 | | Guaranteed software updates until | unknown | | Item Weight | 85 g | | Material | Silicone | | Model Number | 81878 | | Product Dimensions | 20.32 x 10.16 x 5.08 cm; 85 g | ## Product Details - **Brand:** Permatex - **Colour:** Copper - **Full cure time:** 24 Hours - **Item weight:** 85 Grams - **Liquid volume:** 3000 Millilitres ## Images ![S/S Permatex - Ultra Copper - RTV Silicone Gasket Maker - Exhausts to 700oF - 85g - Image 1](https://m.media-amazon.com/images/I/81freAdVPGL.jpg) ## Questions & Answers **Q: Can this be used on a valve cover gasket to get a better seal?** A: Yes. It is better than OEM gaskets in that it conforms to any warpage, dents, dings, & other incongruities, whereas OEM gaskets are designed for factory new, perfect valve covers without flaws. Withstands 700 degrees. **Q: Can I use this product to seal several non-moving parts of a wood burning stove instead of the standard gasketing material?** A: This gasketting goop is absolutely incredible for sealing wood stove parts. I’d certainly never use it on the fire box. But it can and will hold to moving parts in high temperatures. It lasts for several years on one application. **Q: can I use this to seal radiator tubes to a heat exchanger in my gas furnace? Gaskets no longer available for it.** A: Greetings! As I don't know this application, specifically, I can say that say that Ultra Copper is excellent for sealing liquid coolant surfaces in truck/auto repairs. Temperature, up to about 800*F and pressures exceeding 15 psi will remain sealed with this product. U.C. remains a pliant sealing silicone "glue", but it won't harden, as epoxy does. If you need a sealer that also hastens, look elsewhere. If this is for a flange or any flat, secured surface, you're good-to-go. NO acetic acid in this product, if that's a plus for you. **Q: Can I spread this on outside of exhaust manifold leak like you would caulk something or does it have to go between parts? F150 '04 V8** A: It is too much pressure and heat to use any caulk or rtv. Even muffler cement doesn't work. You might have a lean fuel mixture to cause the problem in he first place. Exhaust bolts rust solid from heat erosion, use the right amount of points on the socket to get bolts out(6 sided bolt--6 sided socket) Copper metal exhaust gaskets work well. Mr. Gasket brand. ## 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.tn/products/50081863-s-s-permatex-ultra-copper-rtv-silicone-gasket-maker-exhausts](https://www.desertcart.tn/products/50081863-s-s-permatex-ultra-copper-rtv-silicone-gasket-maker-exhausts) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-11-10*