---
product_id: 255417989
title: "PERMATEX ULTRA COPPER RTV GASKET MAKER NET.85g/ 3.OZ"
brand: "permatex"
price: "¥3283"
currency: JPY
in_stock: false
category: "Permatex"
url: https://www.desertcart.jp/products/255417989-permatex-ultra-copper-rtv-gasket-maker-net-85g-3-oz
store_origin: JP
region: Japan
---

# 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:** ¥3283
**Availability:** ❌ Out of 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?** ¥3283 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/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 RTV GASKET MAKER NET.85g/ 3.OZ : desertcart.ae: Automotive

## 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.

## 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)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-24*