---
product_id: 458493671
title: "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"
brand: "akfix"
price: "฿2422"
currency: THB
in_stock: true
reviews_count: 8
category: "Akfix"
url: https://www.desertcart.co.th/products/458493671-akfix-ht300-high-temp-silicone-gasket-maker-2x10-1-fl
store_origin: TH
region: Thailand
---

# Waterproof & chemical resistant Durable, crack & shrink resistant Heat resistant up to 600°F 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

**Brand:** akfix
**Price:** ฿2422
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal the deal with heat-defying power!

## Quick Answers

- **What is this?** 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 by akfix
- **How much does it cost?** ฿2422 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/458493671-akfix-ht300-high-temp-silicone-gasket-maker-2x10-1-fl)

## 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 Convenience:** Two 10.1 fl.oz. tubes mean you’re always ready for your next project or emergency fix.
- • **Unmatched Heat Endurance:** Withstands extreme temps up to 600°F, perfect for high-performance automotive needs.
- • **Waterproof & Chemical Tough:** Resists weather, chemicals, and aging to keep your seals intact under pressure.
- • **Flexible & Long-Lasting Seal:** Remains pliable after curing—no cracking or brittleness, ensuring a reliable gasket every time.
- • **Versatile Industrial Strength:** Ideal for valves, pumps, motors, stoves, and chimneys—engineered for diverse high-temp applications.

## Overview

Akfix HT300 is a professional-grade red RTV silicone gasket maker designed for high-temperature applications up to 600°F. This flexible, waterproof sealant resists cracking, shrinking, and chemical damage, making it ideal for automotive valve covers and industrial sealing tasks. Sold in a convenient 2-pack, it offers durable, long-lasting performance trusted by DIYers and pros alike.

## 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: Awsome price. Great product - Great price for high temp r.t.v. works great
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.

## 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 | #59,139 in Automotive ( See Top 100 in Automotive ) #56 in Gasket Sealers |
| Brand | Akfix |
| Brand Name | Akfix |
| Color | Red |
| Compatible Material | Metal |
| Customer Reviews | 4.7 out of 5 stars 263 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 | 2.0 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

![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 - Image 1](https://m.media-amazon.com/images/I/61DzXJdRPbL.jpg)

## Available Options

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

## Customer Reviews

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

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

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ 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 Thailand*
*Store origin: TH*
*Last updated: 2026-04-23*