---
product_id: 255417989
title: "PERMATEX ULTRA COPPER RTV GASKET MAKER NET.85g/ 3.OZ"
brand: "permatex"
price: "€ 24.02"
currency: EUR
in_stock: true
category: "Permatex"
url: https://www.desertcart.hr/products/255417989-permatex-ultra-copper-rtv-gasket-maker-net-85g-3-oz
store_origin: HR
region: Croatia
---

# 3x oil resistant, 8x flexible Temp resistant up to 700°F Sensor-safe & non-corrosive PERMATEX ULTRA COPPER RTV GASKET MAKER NET.85g/ 3.OZ

**Brand:** permatex
**Price:** € 24.02
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal the heat, not your worries!

## Quick Answers

- **What is this?** PERMATEX ULTRA COPPER RTV GASKET MAKER NET.85g/ 3.OZ by permatex
- **How much does it cost?** € 24.02 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/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

- • **Trusted by Thousands:** 4.7-star rated with over 3,000 reviews—join the elite DIY pros
- • **Unmatched Heat Endurance:** Handles extreme temps up to 700°F for turbo & exhaust mastery
- • **Precision Sensor-Safe Formula:** Protects sensitive engine sensors with low odor, non-corrosive silicone
- • **Ultimate Flexibility & Durability:** 3x more oil resistant and 8x more flexible than standard silicones
- • **Universal Fit for Pro-Level Repairs:** Seamlessly bonds to all automotive parts for a flawless seal

## Overview

Permatex Ultra Copper RTV Gasket Maker is a high-temp, sensor-safe silicone sealant designed for automotive turbochargers and exhaust systems. It withstands temperatures up to 700°F, offers superior oil resistance and flexibility, and cures in 24 hours to create a durable, vibration-resistant gasket. Ideal for professional-grade repairs with universal compatibility.

## 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.

## 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)

## Available Options

This product comes in different **Size** options.

## 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.hr/products/255417989-permatex-ultra-copper-rtv-gasket-maker-net-85g-3-oz](https://www.desertcart.hr/products/255417989-permatex-ultra-copper-rtv-gasket-maker-net-85g-3-oz)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-05-24*