---
product_id: 458493671
title: "- HT300 High Temp Silicone Gasket Maker (2x10.1 fl.oz.) - Red RTV Gasket Sealer, Flexible High Heat Silicone Sealant Up to 600F, Valve Cover Gasket Sealant for Automotive | 2 Pack"
brand: "akfix"
price: "B/.85"
currency: PAB
in_stock: true
reviews_count: 9
category: "Akfix"
url: https://www.desertcart.com.pa/products/458493671-ht300-high-temp-silicone-gasket-maker-2x10-1-fl-oz
store_origin: PA
region: Panama
---

# Waterproof & chemical resistant Durable, crack & shrink proof Heat resistant up to 600°F - HT300 High Temp Silicone Gasket Maker (2x10.1 fl.oz.) - Red RTV Gasket Sealer, Flexible High Heat Silicone Sealant Up to 600F, Valve Cover Gasket Sealant for Automotive | 2 Pack

**Brand:** akfix
**Price:** B/.85
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal the heat, flex the strength – never miss a beat under pressure!

## Quick Answers

- **What is this?** - HT300 High Temp Silicone Gasket Maker (2x10.1 fl.oz.) - Red RTV Gasket Sealer, Flexible High Heat Silicone Sealant Up to 600F, Valve Cover Gasket Sealant for Automotive | 2 Pack by akfix
- **How much does it cost?** B/.85 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/458493671-ht300-high-temp-silicone-gasket-maker-2x10-1-fl-oz)

## Best For

- akfix enthusiasts

## Why This Product

- Trusted akfix brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dual Pack Value:** Two 10.1 fl.oz. tubes for multiple projects or backup peace of mind
- • **Waterproof Reliability:** Seals tight against moisture, chemicals, and weather extremes
- • **Unmatched Heat Endurance:** Withstands up to 600°F for ultimate engine protection
- • **Pro-Grade RTV Performance:** Trusted by DIYers and pros for valve covers and high-temp gaskets
- • **Flexible & Long-Lasting Seal:** Remains pliable, never brittle or cracked over time

## Overview

Akfix HT300 is a professional-grade high temperature silicone gasket maker designed for automotive and industrial use. It offers exceptional heat resistance up to 600°F, waterproof sealing, and long-lasting flexibility that resists cracking and shrinking. This 2-pack of red RTV silicone sealant is perfect for valve covers, pumps, motors, and other high-heat applications, delivering durable, chemical-resistant performance trusted by both experts and DIY enthusiasts.

## Description

Buy Akfix HT300 High Temp Silicone Gasket Maker (2x10.1 fl.oz.) - Red RTV Gasket Sealer, Flexible High Heat Silicone Sealant Up to 600F, Valve Cover Gasket Sealant for Automotive | 2 Pack: Gasket - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: I needed to think it through before I opened it up. - This was the first time I used this type of dispenser, and I screwed up opening the first one. So I'm really glad I bought a 2 pack. 😁 the gasket worked great on my Jeep.
Review: Awsome price. Great product - Great price for high temp r.t.v. works great

## Features

- 𝗛𝗜𝗚𝗛 𝗛𝗘𝗔𝗧 𝗥𝗘𝗦𝗜𝗦𝗧𝗔𝗡𝗖𝗘 Akfix HT300 is a very powerful, long-lasting adhesive that can endure exposure to high temperatures and is heat resistant silicone. Excellent heat resistance after curing up to 482°F permanently and up to 572°F temporarily.
- 𝗥𝗧𝗩 𝗚𝗔𝗦𝗞𝗘𝗧 𝗠𝗔𝗞𝗘𝗥 With RTV Silicone Gasket Maker, you can count on waterproof performance in most conditions. This silicone caulk is virtually unaffected by chemical deterioration, extreme weather, temperature or aging.
- 𝗦𝗧𝗥𝗢𝗡𝗚 𝗗𝗨𝗥𝗔𝗕𝗟𝗘 This gasket sealant resists mechanical enforcement after curing. Will not crack, shrink or become brittle.
- 𝗥𝗘𝗠𝗔𝗜𝗡𝗦 𝗙𝗟𝗘𝗫𝗜𝗕𝗟𝗘 High temperature silicone is a flexible sealer and long-lasting adhesive that dries slowly, making it a preferred option for both DIYers and experts.
- 𝗩𝗔𝗥𝗜𝗢𝗨𝗦 𝗔𝗣𝗣𝗟𝗜𝗖𝗔𝗧𝗜𝗢𝗡 𝗔𝗥𝗘𝗔𝗦 Our 100% silicone mastic joint sealant is a gap filler used on waterproof sealing and bonding in stoves, chimneys, gaskets in pumps, motors, automobiles and where parts must perform at high temperatures and heat.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B7K698ZG |
| Best Sellers Rank | #79,378 in Automotive ( See Top 100 in Automotive ) #64 in Gasket Sealers |
| Brand | Akfix |
| Brand Name | Akfix |
| Color | Red |
| Compatible Material | Metal |
| Customer Reviews | 4.7 out of 5 stars 276 Reviews |
| Included Components | 2 Qty Silicone Sealant |
| Item Dimensions | 3.92 x 3.92 x 9.05 inches |
| Item Form | Liquid |
| Item Weight | 10.5 ounces |
| Item dimensions L x W x H | 3.92 x 3.92 x 9.05 inches |
| Manufacturer | Akfix |
| Material | Silicone |
| Material Type | Silicone |
| Model | Akfix HT300-2 Pack-FBA |
| Number of Items | 2 |
| Part Number | Akfix HT300-2 Pack-FBA |
| Style | Industrial |
| Style Name | Industrial |
| Surface Recommendation | Door |
| UPC | 767023853098 |
| Unit Count | 2 Count |
| Water Resistance Level | Waterproof |

## Product Details

- **Material:** Silicone
- **Brand:** Akfix
- **Style:** Industrial
- **Item Weight:** 10.5 Ounces
- **Item dimensions L x W x H:** 3.92 x 3.92 x 9.05 inches

## Images

![- HT300 High Temp Silicone Gasket Maker (2x10.1 fl.oz.) - Red RTV Gasket Sealer, Flexible High Heat Silicone Sealant Up to 600F, Valve Cover Gasket Sealant for Automotive | 2 Pack - Image 1](https://m.media-amazon.com/images/I/61DzXJdRPbL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ I needed to think it through before I opened it up.
*by K***N on October 11, 2025*

This was the first time I used this type of dispenser, and I screwed up opening the first one. So I'm really glad I bought a 2 pack. 😁 the gasket worked great on my Jeep.

### ⭐⭐⭐⭐⭐ Awsome price. Great product
*by J***Y on November 6, 2025*

Great price for high temp r.t.v. works great

### ⭐⭐⭐⭐⭐ Favorite gasket maker
*by G***N on December 11, 2024*

I love this stuff.... I use it on just about everything. It does exactly what they say it does and its cheap. Ive had problems with some of their competitors products in the past but never with this stuff..... the tubes also come with a reusable cap which is really nice..... the longest Ive kept a capped opened tube of this stuff laying around was about 6 months and it was still in the same usable condition as the day I opened it. I recommend some disposable gloves and some caution while using it though because that red wants to get on everything and it sticks good as long as the surface isnt wet

## Frequently Bought Together

- Akfix HT300 High Temp Silicone Gasket Maker (2x10.1 fl.oz.) - Red RTV Gasket Sealer, Flexible High Heat Silicone Sealant Up to 600F, Valve Cover Gasket Sealant for Automotive | 2 Pack
- Bates- Caulking Silicone Gun, 10:1 Thrust Ratio, Hand Caulking Guns, No Drip
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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-08-20*