---
product_id: 349383769
title: "Permatex 81409 High-Temp Red RTV Silicone Gasket, 11 oz."
brand: "permatex"
price: "R703"
currency: ZAR
in_stock: true
category: "Permatex"
url: https://www.desertcart.co.za/products/349383769-permatex-81409-high-temp-red-rtv-silicone-gasket-11-oz
store_origin: ZA
region: South Africa
---

# High-temp resistance up to 650°F Distinctive red color for easy application 11 oz. professional-grade tube Permatex 81409 High-Temp Red RTV Silicone Gasket, 11 oz.

**Brand:** permatex
**Price:** R703
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal the deal with high-temp confidence! 🔧

## Quick Answers

- **What is this?** Permatex 81409 High-Temp Red RTV Silicone Gasket, 11 oz. by permatex
- **How much does it cost?** R703 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/349383769-permatex-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

- • **Pro-Level Volume:** Generous 11 oz. tube ensures you have enough sealant for multiple projects without constant reordering.
- • **Precision Application:** Bright red RTV silicone makes gasket placement and inspection effortless.
- • **Unmatched Heat Endurance:** Withstands extreme temperatures up to 650°F, perfect for high-performance engines.
- • **Trusted Automotive Essential:** Ranked #138 in Automotive Sealants, backed by 4.6-star reviews from professionals.
- • **Versatile Metal Compatibility:** Formulated to bond seamlessly with aluminum and other metals for durable, leak-proof seals.

## Overview

Permatex 81409 High-Temp Red RTV Silicone Gasket is a professional-grade, 11 oz. sealant designed for automotive use. It withstands temperatures up to 650°F, bonds well with metals like aluminum, and features a vivid red color for easy application. Highly rated and trusted by mechanics, it’s a must-have for reliable, long-lasting gasket sealing.

## Description

Permatex 81409 High-Temp Red RTV Silicone Gasket, 11 oz.

## Features

- manufacturer: Permatex
- Item Trademark: PERMATEX
- Item Weight: pounds, pounds, 0.4, 0.4

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000HBIB80 |
| Best Sellers Rank | #6,569 in Automotive ( See Top 100 in Automotive ) #40 in Automotive Fillers, Adhesives & Sealants |
| Customer Reviews | 4.6 4.6 out of 5 stars (264) |
| Date First Available | 4 August 2012 |
| Item display weight | 1.03 Pounds |
| Item model number | 81409 |
| Item volume | 2400 Cubic Inches |
| Manufacturer | Permatex |
| Material type | Aluminum, Metal, Silicone |
| Part number | 81409 |
| Product Dimensions | 4.78 x 4.78 x 28.58 cm; 181.44 g |

## Product Details

- **Brand:** Permatex
- **Colour:** Red
- **Full cure time:** 24 Hours
- **Item weight:** 0.4 Pounds
- **Liquid volume:** 11 Fluid Ounces

## Images

![Permatex 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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**Shop now:** [https://www.desertcart.co.za/products/349383769-permatex-81409-high-temp-red-rtv-silicone-gasket-11-oz](https://www.desertcart.co.za/products/349383769-permatex-81409-high-temp-red-rtv-silicone-gasket-11-oz)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-11-12*