---
product_id: 337466544
title: "2-Pack : Permatex 81878 3 Oz Ultra Copper RTV Silicone Gasket Maker"
brand: "permatex"
price: "€ 80.41"
currency: EUR
in_stock: true
url: https://www.desertcart.nl/products/337466544-2-pack-permatex-81878-3-oz-ultra-copper-rtv-silicone
store_origin: NL
region: Netherlands
---

# High-temp resistant copper formula 2-Pack for double the value 3 oz Ultra Copper RTV Silicone 2-Pack : Permatex 81878 3 Oz Ultra Copper RTV Silicone Gasket Maker

**Brand:** permatex
**Price:** € 80.41
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal it like a pro, twice the power! 🛠️

## Quick Answers

- **What is this?** 2-Pack : Permatex 81878 3 Oz Ultra Copper RTV Silicone Gasket Maker by permatex
- **How much does it cost?** € 80.41 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/337466544-2-pack-permatex-81878-3-oz-ultra-copper-rtv-silicone)

## 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

- • **Double the Efficiency:** 2-pack supply means you’re always ready for your next project without delay.
- • **Versatile Application:** Perfect for automotive, industrial, and household gasket repairs—professional-grade results.
- • **Precision Sealant Power:** Ultra Copper RTV formula ensures a leak-proof, durable gasket every time.
- • **Easy to Use & Long-Lasting:** Silicone-based formula cures quickly to a tough, flexible gasket that resists oil and chemicals.
- • **Heat-Resistant Performance:** Withstands extreme temperatures up to 700°F (371°C) for reliable engine protection.

## Overview

Permatex 81878 Ultra Copper RTV Silicone Gasket Maker comes in a convenient 2-pack of 3 oz tubes, delivering a high-temperature resistant, copper-infused silicone sealant designed for durable, leak-proof gaskets in automotive and industrial applications.

## Description

Permatex 81878 3 Oz Ultra Copper RTV Silicone Gasket Maker (2 PACK)

## Features

- 2 PACK

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | ITW Global Brands |
| Brand | Permatex |
| Product Dimensions | 6.6 x 9.65 x 20.32 cm; 181.44 g |
| Item model number | 81878 |
| Manufacturer Part Number | 81878 |
| Material | Copper, Silicone |
| Size | 3 oz. |
| Colour | Black |
| Manufacturer | ITW Global Brands |
| Item Weight | 181 g |

## Product Details

- **Brand:** Permatex
- **Material:** Copper, Silicone
- **Colour:** Black
- **UPC:** 686226818782
- **Manufacturer:** ITW Global Brands

## Images

![2-Pack : Permatex 81878 3 Oz Ultra Copper RTV Silicone Gasket Maker - Image 1](https://m.media-amazon.com/images/I/91P4MvrwZsL.jpg)

## Available Options

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

## Questions & Answers

**Q: I have a very old crown stove that has asbestos gaskets between the top and bottom parts of each burner that have shrunken badly,Would this fill gaps?**
A: Keep the Asbestos between the RTV and steel and you will probably be fine. I just used this(product) with some New Fiberglass woodstove rope on my Kitchen Oven, for a Door Gasket. It held Better than the glue they give you with the Fireplace Gasket.

**Q: Do you get two tubes?**
A: They sent me 1 3oz tube instead of the 2 pack with a total of 6.4 oz like description states. Contact customer service like i did to get it taken care of.

**Q: Will this work to make a seal with an oil pan?**
A: No, this product is intended for high temperature uses "Exhaust manifolds, Headers". You'd be better off with a product like the Right Stuff, we used it a lot for sealing diesel engine oil pans. https://www.amazon.com/Permatex-29208-Right-Stuff-Gasket/dp/B000HBNV8U/ref=sr_1_1?crid=32S5CHICLZZCI&keywords=Rightstuff&qid=1684392092&s=automotive&sprefix=rightstuff%2Cautomotive%2C66&sr=1-1

**Q: Can i use this to adhere an after market clutch cover on a motorcycle!?**
A: The Permatex 81878 3 Oz Ultra Copper RTV Silicone Gasket Maker is a product commonly used for creating reliable, high-temperature seals on various automotive applications, including engines, transmission components, and other parts that require a durable gasket or sealant.

## Frequently Bought Together

- Permatex 81878 3 Oz Ultra Copper RTV Silicone Gasket Maker (2 Pack)
- Permatex 85080 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, Sensor Safe And Non-Corrosive, For High Flex And Oil Resistant Applications 9.5 oz
- Permatex 81630 Ultra Red High Temperature Gasket Maker, 3 oz

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**Shop now:** [https://www.desertcart.nl/products/337466544-2-pack-permatex-81878-3-oz-ultra-copper-rtv-silicone](https://www.desertcart.nl/products/337466544-2-pack-permatex-81878-3-oz-ultra-copper-rtv-silicone)

---

*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-24*