--- product_id: 157644995 title: "Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube" brand: "permatex" price: "€ 31.79" currency: EUR in_stock: true reviews_count: 9 category: "Permatex" url: https://www.desertcart.hr/products/157644995-permatex-81878-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker store_origin: HR region: Croatia --- # 8x flexibility vs cut gaskets Temp range -75°F to 700°F 3x oil resistance vs conventional silicones Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube **Brand:** permatex **Price:** € 31.79 **Availability:** ✅ In Stock ## Summary > 🔥 Seal the deal with the ultimate high-temp gasket maker! ## 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?** € 31.79 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/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 traditional cut gaskets, ensuring a perfect, vibration-proof seal. - • **Sensor-Safe & Low Odor:** Formulated to protect sensitive engine sensors with non-corrosive, low-odor chemistry. - • **Superior Oil Resistance:** Three times more resistant to oil degradation than standard silicones—keeps seals intact longer. - • **Unmatched Heat Endurance:** Handles extreme temps up to 700°F intermittent for turbocharged and high-performance engines. - • **Universal Fit & Waterproof:** Works seamlessly on diverse surfaces and resists water, auto fluids, and shop chemicals. ## Overview Permatex 81878 Ultra Copper RTV Silicone Gasket Maker is a professional-grade, copper-colored sealant designed for extreme temperature applications (-75°F to 700°F intermittent). It offers triple the oil resistance and eight times the flexibility of conventional silicones, making it ideal for turbocharged and high-performance engines. Sensor-safe, low odor, and waterproof, it ensures superior adhesion and durability across various automotive surfaces, curing fully in 24 hours. ## 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. Review: Good as sealent - Used on diesel turbocharger, sealent was 98% intact between turbocharger n exhaust manifold. As said by manufacturer had to allow 24 hrs before starting the engine. Review: Hightempe gas kit maker bonds - This item very useful it's working I'm using in my car in between torcher to dpf silencer no gas leak ## 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 | | Best Sellers Rank | #58,487 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #63 in Fillers, Adhesives & Sealants | | Brand | Permatex | | Brand Name | Permatex | | Colour | Copper | | Country of Publication | USA | | Customer Reviews | 4.7 out of 5 stars 3,241 Reviews | | Full Cure Time | 24 Hours | | Global Trade Identification Number | 00686226818782 | | Included Components | Permatex 81878 | | Item Form | Paste | | Item Type Name | Gasket | | Item Weight | 85 Grams | | Liquid Volume | 3000 Millilitres | | Manufacturer | Permatex | | Material Type | Copper | | Size of liquid in ounces | 3000 Millilitres | | Surface Recommendation | Pipe | | UPC | 686226818782 | | Unit Count | 3.0 Ounce | | Warranty Description | Manufacturer | | Water Resistance Level | 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/81freAdVPGL.jpg) ## 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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good as sealent *by P***A on 23 May 2022* Used on diesel turbocharger, sealent was 98% intact between turbocharger n exhaust manifold. As said by manufacturer had to allow 24 hrs before starting the engine. ### ⭐⭐⭐⭐ Hightempe gas kit maker bonds *by B***I on 22 March 2025* This item very useful it's working I'm using in my car in between torcher to dpf silencer no gas leak ### ⭐ Not working *by S***R on 5 May 2026* Not working properly ## 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.hr/products/157644995-permatex-81878-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker](https://www.desertcart.hr/products/157644995-permatex-81878-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-18*