--- product_id: 255417989 title: "PERMATEX ULTRA COPPER RTV GASKET MAKER NET.85g/ 3.OZ" brand: "permatex" price: "20827CFA" currency: XOF in_stock: true reviews_count: 6 category: "Permatex" url: https://www.desertcart.sn/products/255417989-permatex-ultra-copper-rtv-gasket-maker-net-85g-3-oz store_origin: SN region: Senegal --- # 3x oil resistant, 8x flexible Withstands up to 700°F Sensor-safe & non-corrosive PERMATEX ULTRA COPPER RTV GASKET MAKER NET.85g/ 3.OZ **Brand:** permatex **Price:** 20827CFA **Availability:** ✅ In Stock ## Summary > 🔥 Seal the heat, own the street! ## Quick Answers - **What is this?** PERMATEX ULTRA COPPER RTV GASKET MAKER NET.85g/ 3.OZ by permatex - **How much does it cost?** 20827CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/255417989-permatex-ultra-copper-rtv-gasket-maker-net-85g-3-oz) ## 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 Defender:** Handles turbocharger temps up to 700°F without breaking a sweat. - • **Unmatched Flexibility:** Eight times more flexible than cut gaskets to resist vibration and wear. - • **Precision Safe Formula:** Sensor-safe, low odor, and non-corrosive for worry-free application. - • **Oil-Resistant Powerhouse:** Three times more oil resistant than conventional silicones for lasting durability. - • **Universal Fit, Professional Finish:** Perfect for exhaust systems and high-temp automotive parts with superior adhesion. ## Overview Permatex Ultra Copper RTV Gasket Maker is a high-temp silicone sealant designed for automotive exhaust and turbocharger applications. It withstands intermittent temperatures up to 700°F (371°C), offers superior oil resistance and flexibility, and is sensor-safe with low odor and non-corrosive properties, ensuring professional-grade durability and performance. ## Description Permatex Ultra Copper is a high temperature RTV gasket maker, resisting temperatures up to 700°F (371°C). Ultra Copper is tested to exceed OEM specifications and is ideal for high temperature applications such as turbocharger applications and exhaust systems. For maximum performance, with the highest temperature resistance today up to 750°F (399°C) check out Permatex’s Optimum Red. Review: Do NOT apply on your exhaust flanges - My heart is still pounding as I was rushing in all directions trying to get something to extinguish the fire with. I applied this RTV on the collector flange, downstream the headers, to arrest a leak and correct the AFR reading on the wideband. I saw some smoke, and I thought maybe it's the high temp paint on the header. Next I saw flames, and you know the rest. Beware, for your own safety! Review: excelente en las uniones del escape de mi motocicleta - Este sellador de silicona de alta temperatura ha funcionado de manera excelente en las uniones del escape de mi motocicleta. Su resistencia al calor extremo garantiza un sellado duradero sin deteriorarse con el tiempo. La aplicación es sencilla y la adherencia es muy buena, asegurando que no haya fugas ni vibraciones molestas en las conexiones. Además, su formulación a base de cobre proporciona una excelente conductividad térmica y estabilidad en condiciones exigentes. En general, un producto confiable y altamente recomendable para sellar uniones expuestas a altas temperaturas, como sistemas de escape y componentes de motor. ¡Gran desempeño! ## Features - High-Temp Gasket Maker - For high operating temperatures, turbocharger applications and exhaust systems - Sensor-safe, low odor, non-corrosive - Temperature range -65°F to 700°F (-54°C to 371°C) intermittent - Resists auto and shop fluids and vibration - 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 Gaske - Sensor-Safe, Low Odor, And Non-Corrosive With Superior Adhesion - Temperature Range -75F To 700F Intermittent ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002UEOPA | | ASIN | B0002UEOPA | | Best Sellers Rank | #6,329 in Automotive ( See Top 100 in Automotive ) #33 in Automotive Fillers, Adhesives & Sealants | | Brand Name | Permatex | | Color | Black | | Customer Reviews | 4.7 4.7 out of 5 stars (3,140) | | Customer reviews | 4.7 4.7 out of 5 stars (3,140) | | Date First Available | 3 August 2012 | | Full Cure Time | 24 Hours | | Global Trade Identification Number | 00686226818782 | | Included Components | silicone | | Is Discontinued By Manufacturer | Yes | | Item Form | Liquid | | Item Type Name | gasket maker | | Item Weight | 85 Grams | | Item model number | 81878 | | Liquid Volume | 3000 Milliliters | | Manufacturer | permatex | | Manufacturer | permatex | | Material Type | Silicone | | Product Dimensions | 20.32 x 10.16 x 5.08 cm; 85 g | | Surface Recommendation | Automotive Parts | | UPC | 686226818782 | | Unit Count | 85 Grams | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** Permatex - **Colour:** Black - **Full cure time:** 24 Hours - **Item weight:** 85 Grams - **Liquid volume:** 3000 Milliliters ## Images ![PERMATEX ULTRA COPPER RTV GASKET MAKER NET.85g/ 3.OZ - 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. ## Customer Reviews ### ⭐⭐ Do NOT apply on your exhaust flanges *by A***N on 3 March 2023* My heart is still pounding as I was rushing in all directions trying to get something to extinguish the fire with. I applied this RTV on the collector flange, downstream the headers, to arrest a leak and correct the AFR reading on the wideband. I saw some smoke, and I thought maybe it's the high temp paint on the header. Next I saw flames, and you know the rest. Beware, for your own safety! ### ⭐⭐⭐⭐⭐ excelente en las uniones del escape de mi motocicleta *by E***O on 5 February 2025* Este sellador de silicona de alta temperatura ha funcionado de manera excelente en las uniones del escape de mi motocicleta. Su resistencia al calor extremo garantiza un sellado duradero sin deteriorarse con el tiempo. La aplicación es sencilla y la adherencia es muy buena, asegurando que no haya fugas ni vibraciones molestas en las conexiones. Además, su formulación a base de cobre proporciona una excelente conductividad térmica y estabilidad en condiciones exigentes. En general, un producto confiable y altamente recomendable para sellar uniones expuestas a altas temperaturas, como sistemas de escape y componentes de motor. ¡Gran desempeño! ### ⭐⭐⭐⭐⭐ Sehr gutes Produkt *by L***L on 11 January 2026* Sehr gutes Produkt. ## 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.sn/products/255417989-permatex-ultra-copper-rtv-gasket-maker-net-85g-3-oz](https://www.desertcart.sn/products/255417989-permatex-ultra-copper-rtv-gasket-maker-net-85g-3-oz) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-08-10*