---
product_id: 2943437
title: "81409 High-Temp Red RTV Silicone Gasket, 11 oz."
brand: "permatex"
price: "185.18 DT"
currency: TND
in_stock: true
category: "Permatex"
url: https://www.desertcart.tn/products/2943437-81409-high-temp-red-rtv-silicone-gasket-11-oz
store_origin: TN
region: Tunisia
---

# Resists cracking & shrinking over time 650°F intermittent heat resistance Replaces almost any cut gasket 81409 High-Temp Red RTV Silicone Gasket, 11 oz.

**Brand:** permatex
**Price:** 185.18 DT
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal the deal with heat-proof confidence!

## Quick Answers

- **What is this?** 81409 High-Temp Red RTV Silicone Gasket, 11 oz. by permatex
- **How much does it cost?** 185.18 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/2943437-81409-high-temp-red-rtv-silicone-gasket-11-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

- • **Thermal Cycle Tough:** Prevents cracking, shrinking, and migration even under intense temperature swings.
- • **Extreme Heat Defender:** Withstands scorching temps up to 650°F, perfect for heavy-duty engines and towing demands.
- • **OEM-Grade Reliability:** Trusted since the '70s with sensor-safe, torque-retentive silicone for modern engine tech.
- • **Fluid-Resistant Formula:** Engineered to resist oil, transmission fluid, and shop chemicals for long-lasting durability.
- • **Universal Gasket Replacement:** Say goodbye to cut gasket hassles—creates reliable formed-in-place seals every time.

## Overview

Permatex 81409 High-Temp Red RTV Silicone Gasket Maker is a professional-grade, OEM-specified sealant designed for extreme temperature ranges (-65°F to 650°F intermittent). It replaces traditional cut gaskets by forming durable, crack-resistant seals that withstand thermal cycling and resist automotive fluids. Ideal for valve covers, oil pans, timing covers, and more, it delivers superior torque retention and sensor-safe performance trusted by mechanics since the 1970s.

## Description

Permatex High-Temp Red RTV Silicone Gasket Maker is formulated for high temperature applications or heavy-duty use such as towing. It replaces almost any cut gasket by making reliable 'formed-in-place' gaskets that resist cracking, shrinking and migrating caused by thermal cycling. Coats pre-cut gaskets to increase reliability. Resists auto and shop fluids, with a temperature range of -65 degrees fahrenheit to 650 degrees fahrenheit intermittent. A first generation 1970-1980 gasket maker, it is OEM specified. Permatex offers significant performance advantages which include outstanding oil resistance, 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.

## Features

- Formulated for high temperature applications or heavy-duty use (such as towing); resists auto and shop fluids
- Replaces almost any cut gasket by making reliable "formed-in-place" gaskets that resist cracking, shrinking and migrating caused by thermal cycling
- Coats pre-cut gaskets to increase reliability
- Temperature Range: -65°F to 650°F (-54°C to 343°C) intermittent
- Suggested Applications: Valve covers, oil pans, timing covers, water pumps, and thermostat housings
- Formulated for hi-temp applications, or heavy-duty use
- Replaces almost any cut gasket, and coats pre-cut gaskets to increase reliability
- Makes reliable 'formed-in-place' gaskets that resist cracking, shrinking and migrating
- Temperature range of -65F to 650F intermittent
- Suggested Applications: Valve covers, oil pans, timing covers, water pumps, thermostat housings, transmission pans

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000HBIB80 |
| Best Sellers Rank | #27,764 in Automotive ( See Top 100 in Automotive ) #33 in Gasket Sealers |
| Brand | Permatex |
| Customer Reviews | 4.6 4.6 out of 5 stars (266) |
| Date First Available | April 1, 2004 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 6.4 ounces |
| Item model number | 81409 |
| Manufacturer | Permatex |
| Manufacturer Part Number | 81409 |
| Model | 81409 |
| OEM Part Number | 81409 |
| Product Dimensions | 1.88 x 1.88 x 11.25 inches |

## Product Details

- **Brand:** Permatex
- **Color:** Red
- **Full Cure Time:** 24 Hours
- **Item Weight:** 0.4 Pounds
- **Liquid Volume:** 11 Fluid Ounces

## Images

![81409 High-Temp Red RTV Silicone Gasket, 11 oz. - Image 1](https://m.media-amazon.com/images/I/51W8qNlFSML.jpg)

## Questions & Answers

**Q: would gasoline eat it? Wondered if it could fix a gas line.**
A: Yes - gas would eat it, the only thing that will fix a gas line is a new one....

**Q: Is this rear differential lubricant compatible?**
A: Permatex 81409 High Temp Red RTV is a Sealant. It is one the most widely used gasket compounds. Made from silicone, RTV is air curing, it seals, bonds waterproofs, fills surface irregularities, remains flexible, doesn't shrink, is relatively easy to remove, and is used as supplementary sealer with almost all low and medium temperature gaskets. It used on the gasket or gaskets of differential. Compatible is not in question because it used on the gasket or gaskets which are outside the flange of differential. I hope that this answer your question. Please let me know if this helps.

**Q: Can I seal a knife cut on a rubber roller on a laminator**
A: I was told by my furnace repair man that this is a 5 star

**Q: Will this product adhear to Cast Iron?**
A: Yes

## Frequently Bought Together

- Permatex 81409 High-Temp Red RTV Silicone Gasket, 11 oz.
- Permatex 24105 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, Sensor Safe And Non-Corrosive, For High Flex And Oil Resistant Applications 13 oz
- Permatex 82195 Ultra Grey Rigid High-Torque RTV Silicone Gasket Maker, Sensor Safe And Non-Corrosive, For High Torque And Vibration Resistant Applications, 13 oz

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-27*