---
product_id: 2943437
title: "81409 High-Temp Red RTV Silicone Gasket, 11 oz."
brand: "permatex"
price: "€ 58.73"
currency: EUR
in_stock: true
reviews_count: 10
category: "Permatex"
url: https://www.desertcart.nl/products/2943437-81409-high-temp-red-rtv-silicone-gasket-11-oz
store_origin: NL
region: Netherlands
---

# 1 hour initial hardening 650°F max temp resistance 6mm max gap fill 81409 High-Temp Red RTV Silicone Gasket, 11 oz.

**Brand:** permatex
**Price:** € 58.73
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal the deal with Permatex – where high-temp meets high-performance!

## Quick Answers

- **What is this?** 81409 High-Temp Red RTV Silicone Gasket, 11 oz. by permatex
- **How much does it cost?** € 58.73 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/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

- • **Fluids? No Problem!:** Resists automotive oils and shop fluids to keep your engine leak-proof under pressure.
- • **Fast & Reliable Seal:** Initial hardening in just 1 hour means less downtime and quicker repairs.
- • **OEM-Grade Performance:** Trusted since the '70s, sensor-safe and compatible with modern materials like aluminum and bi-metal alloys.
- • **Unmatched Heat Endurance:** Withstands extreme temps from -65°F to 650°F, perfect for heavy-duty engines and towing.
- • **Versatile Gasket Replacement:** Forms durable, crack-resistant gaskets that replace almost any cut gasket seamlessly.

## 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). It creates durable, formed-in-place gaskets that resist cracking, shrinking, and fluid damage, ideal for valve covers, oil pans, and other critical engine components. With fast initial curing and waterproof properties, it’s the go-to choice for millennial pros demanding reliability and efficiency in automotive maintenance.

## 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.

Review: Durability - Used the permatex to adhere a dryer door gasket to the door. Worked as expected being a permatex product. Have used their products in the past with great success and so far this job is no exception. Will continue with their products.
Review: Exactly as Advertised and Cheap - Way cheaper than other places online and especially cheaper than the parts store. Exact product that it says it is.

## 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 | #43,111 in Automotive ( See Top 100 in Automotive ) #45 in Gasket Sealers |
| Brand | Permatex |
| Color | Red |
| Customer Reviews | 4.6 4.6 out of 5 stars (262) |
| Date First Available | April 1, 2004 |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00686226814098 |
| Initial Hardening Time | one Hours |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 6.4 ounces |
| Item model number | 81409 |
| Liquid Volume | 11 Fluid Ounces |
| Manufacturer | Permatex |
| Manufacturer Part Number | 81409 |
| Material | Silicone |
| Maximum Gap Fill | 6 Millimeters |
| Model | 81409 |
| Number of Items | 1 |
| OEM Part Number | 81409 |
| Product Dimensions | 1.88 x 1.88 x 11.25 inches |
| Surface Recommendation | Clean Dry Surfaces like Valve covers, oil pans, timing covers, water pumps, and thermostat housings |
| UPC | 686226814098 |
| Unit Count | 11.0 Ounce |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Permatex
- **Color:** Red
- **Full Cure Time:** 24 Hours
- **Item Weight:** 6.4 ounces
- **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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Durability
*by S***E on January 29, 2024*

Used the permatex to adhere a dryer door gasket to the door. Worked as expected being a permatex product. Have used their products in the past with great success and so far this job is no exception. Will continue with their products.

### ⭐⭐⭐⭐⭐ Exactly as Advertised and Cheap
*by M***L on August 22, 2023*

Way cheaper than other places online and especially cheaper than the parts store. Exact product that it says it is.

### ⭐⭐⭐⭐⭐ As described.
*by J***Z on September 3, 2023*

Bought this here cause it’s significantly cheaper than auto stores. Exactly the same product, just much cheaper. Works great for repairing small engines with hard to find/make gaskets. Would highly recommend.

## 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.nl/products/2943437-81409-high-temp-red-rtv-silicone-gasket-11-oz](https://www.desertcart.nl/products/2943437-81409-high-temp-red-rtv-silicone-gasket-11-oz)

---

*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-03-19*