---
product_id: 157644995
title: "81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube"
brand: "permatex"
price: "₨9988"
currency: LKR
in_stock: true
reviews_count: 8
category: "Permatex"
url: https://www.desertcart.lk/products/157644995-81878-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker-3
store_origin: LK
region: Sri Lanka
---

# 8x Flexibility Max Temp 700°F 3x Oil Resistance 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube

**Brand:** permatex
**Price:** ₨9988
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal the deal with Permatex Ultra Copper – where performance meets precision!

## Quick Answers

- **What is this?** 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube by permatex
- **How much does it cost?** ₨9988 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/157644995-81878-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker-3)

## 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

- • **Next-Level Flexibility:** Eight times more flexible than cut gaskets, adapting seamlessly to vibrations and engine movements without cracking.
- • **Sensor-Safe & Low Odor:** Formulated to protect sensitive engine sensors and keep your workspace fresh—no corrosive fumes here.
- • **Superior Oil Resistance:** Three times more oil resistant than standard silicones, ensuring a leak-proof, long-lasting seal under pressure.
- • **Unmatched Heat Endurance:** Handles extreme temps from -75°F to 700°F intermittent—perfect for turbocharged engines and high-performance rides.
- • **Effortless Application & Cure:** Ready to use straight from the tube with a 24-hour full cure time, delivering professional-grade adhesion every time.

## Overview

Permatex 81878 Ultra Copper RTV Silicone Gasket Maker is a high-performance, sensor-safe sealant designed for extreme temperature ranges (-75°F to 700°F intermittent). It offers three times the oil resistance and eight times the flexibility of conventional silicones, making it ideal for turbocharged and high-performance engines. With superior adhesion, low odor, and non-corrosive properties, it ensures durable, leak-proof seals on oil-contaminated metals and withstands vibrations and harsh automotive fluids.

## Description

Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker is the most advanced, high temp RTV silicone gasket available. Three times more oil resistant than conventional silicones and eight times more flexible than cut gaskets, it is sensor-safe, low odor, and non-corrosive with superior adhesion. Highest operating temperatures for 4-cylinder, turbocharged or high-performance engines and OEM specified, with a temperature range of -75 degrees fahrenheit to 700 degrees fahrenheit intermittent. Also resists auto and shop fluids and vibration. These gasket makers offer significant performance advantages, excellent torque retention and hi-temp, sensor-safe properties. engine sensors and new component materials such as aluminum, bi-metal alloys and high-tech plastics, have created the need for superior RTV silicone gasket makers in both OEM production and service applications. Permatex always has the right gasket maker for your application.

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 |
| Assembly Required | No |
| Best Sellers Rank | #77,148 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #83 in Fillers, Adhesives & Sealants |
| Brand | Permatex |
| Colour | Copper |
| Country of Origin | USA |
| Customer Reviews | 4.7 4.7 out of 5 stars (3,153) |
| Date First Available | 3 August 2012 |
| Exterior | Painted |
| Full Cure Time | 24 Hours |
| Generic Name | Gasket |
| Global Trade Identification Number | 00686226818782 |
| Item Dimensions LxWxH | 20.3 x 10.2 x 5.1 Centimeters |
| Item Form | Paste |
| Item Weight | 85 g |
| Item model number | 81878 |
| Liquid Volume | 3000 Millilitres |
| Manufacturer | Permatex |
| Manufacturer Part Number | 81878 |
| Material | Copper |
| Model | Permatex 81878 |
| Net Quantity | 3.0 Ounce |
| Number of Items | 1 |
| OEM Part Number | PMT81878 |
| Product Dimensions | 20.32 x 10.16 x 5.08 cm; 85 g |
| Size | 3 oz |
| Special Features | Forms a superior bond on oil contaminated metals and maintains outstanding oil resistance |
| Surface Recommendation | Pipe |
| UPC | 686226818782 |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Permatex
- **Colour:** Copper
- **Full Cure Time:** 24 Hours
- **Item Weight:** 85 Grams
- **Liquid Volume:** 3000 Millilitres

## Images

![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

### ⭐⭐⭐ Stuff is ok
*by P***O on 1 December 2020*

Peels off easily so not very useful unless metals are bound together with nuts.

## 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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**Shop now:** [https://www.desertcart.lk/products/157644995-81878-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker-3](https://www.desertcart.lk/products/157644995-81878-ultra-copper-maximum-temperature-rtv-silicone-gasket-maker-3)

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-19*