---
product_id: 30694019
title: "56521 High Performance Thread Sealant, 50 ml, White"
brand: "permatex"
price: "₩45932"
currency: KRW
in_stock: true
reviews_count: 13
category: "Permatex"
url: https://www.desertcart.kr/products/30694019-56521-high-performance-thread-sealant-50-ml-white
store_origin: KR
region: South Korea
---

# Airtight & watertight hold Temp resistant -60°F to 300°F Seals up to 10,000 PSI 56521 High Performance Thread Sealant, 50 ml, White

**Brand:** permatex
**Price:** ₩45932
**Availability:** ✅ In Stock

## Summary

> 🔩 Lock it tight, seal it right — the pro’s choice for unstoppable connections!

## Quick Answers

- **What is this?** 56521 High Performance Thread Sealant, 50 ml, White by permatex
- **How much does it cost?** ₩45932 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/30694019-56521-high-performance-thread-sealant-50-ml-white)

## 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 Toughness:** Operates flawlessly from freezing -60°F to scorching 300°F environments.
- • **Versatile Metal Master:** Ideal for stainless steel, oil lines, fuel fittings, and critical automotive joints.
- • **Fast, Clean Application:** Replaces messy tapes with smooth, rapid curing for professional-grade results.
- • **Corrosion & Galling Shield:** Protects metal threads from rust and wear, extending component life.
- • **Unmatched Pressure Defense:** Withstands extreme pressures up to 10,000 PSI for leak-proof confidence.

## Overview

Permatex 56521 High Performance Thread Sealant is a premium synthetic rubber formula designed for heavy-duty automotive and industrial use. It delivers a rapid-curing, airtight, and watertight seal that resists pressures up to 10,000 PSI and temperatures from -60°F to 300°F. Engineered to prevent leaks, corrosion, and loosening on metal and tapered pipe threads, this white sealant replaces traditional tapes with a cleaner, stronger, and more reliable solution favored by professionals and DIYers alike.

## Description

Permatex High Performance Thread Sealant offers the ultimate sealing power with the added strength of a blue thread locker. This versatile sealant creates an airtight, watertight hold that prevents leaks, loosening, and corrosion, even under high pressures and temperatures. It seals connections up to 1,000 PSI, with a rapid cure capable of withstanding 10,000 PSI, ensuring leak-proof reliability for your toughest jobs. Temperature resistant from -60°F to 300°F, it’s designed specifically for metal and tapered pipe thread fittings, delivering protection against galling, rust, and corrosion over time. Ideal for stainless steel fittings, oil PSI sending units, oil and coolant lines, intake manifold switches, rear axle fill plugs, fuel fittings, and more, this high-performance thread sealant replaces traditional pipe tape and dope with a faster, cleaner application. Keep your metal connections locked and secure without the risk of leaks, making this sealant a must-have for both professional mechanics and DIY enthusiasts who need lasting, high-strength results.

Review: Excellent Sealant for Automotive Use! - used it to seal the differential plugs on my Ram 1500. It worked perfectly! The application was smooth and easy, and it provided a strong, leak-proof seal that gives me peace of mind. I really appreciate that it’s designed for high-temperature environments, which is essential for automotive applications. After driving for a while, I’ve had zero leaks and everything is holding up great. The tube size is convenient and has plenty of product for multiple uses. If you need a reliable, high-performance thread sealant for your vehicle, this is an excellent choice. Highly recommend for anyone doing differential or drivetrain work!
Review: Great Seal, Great Heat Resistance - I was installing a three-way valve and I didn’t have the means to pressure test my threaded connections until everything was threaded and sweated in place. Once the rest of the fittings were sweated together, I couldn’t tighten the threaded connections. The first time around, I used teflon tape and it didn’t work well. Next, I tried this permatex sealant because it would make a permanent anaerobic seal, and it can withstand sweating connections nearby. It worked great! The connection has been holding for months now with no water leaks. I recommend wearing nitrile or latex gloves when handling, it’ll let you work more quickly and cleanup easier.

## Features

- These Are Complete Line Of Heavy-Duty Shop Products
- These Products On Exceptionally High Order Fulfillment Rates, Breadth Of Available Products
- Through Creativity, Productivity And Innovation - This Brand Continues To Develop The Finest Automotive Accessories
- Part number: 56521

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000FW7VHI |
| Best Sellers Rank | #644 in Automotive ( See Top 100 in Automotive ) #2 in Thread Lock Sealers |
| Brand | Permatex |
| Color | White |
| Date First Available | April 1, 2004 |
| Department | Thread Sealants |
| Global Trade Identification Number | 00079340565210 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 1.76 ounces |
| Item dimensions L x W x H | 8 x 3 x 2 inches |
| Item model number | 56521 |
| Manufacturer | Permatex |
| Material | Synthetic Rubber |
| Number of Items | 1 |
| Product Dimensions | 8 x 3 x 2 inches |
| Style | High Performance Thread Sealant |
| Surface Recommendation | Fixture |
| UPC | 079340565210 |
| Unit Count | 1.69 Fluid Ounces |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Permatex
- **Item Weight:** 1.76 ounces
- **Item dimensions L x W x H:** 8 x 3 x 2 inches
- **Material:** Synthetic Rubber
- **Style:** High Performance Thread Sealant

## Images

![56521 High Performance Thread Sealant, 50 ml, White - Image 1](https://m.media-amazon.com/images/I/71XJlR1DA2L.jpg)

## Available Options

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

## Questions & Answers

**Q: Does this stuff seal pneumatic (800 psi) threads on an and npt fittings.**
A: I’ve not used it for your application however, her is the product discription for reference 

Formulated for metal, tapered ppe thread fittings. Protects threaded areas from rust and corrosion. Uses: head bolts, oil senders, oil and coolant lines, fuel fittings.
Features & details
Cures rapidly to withstand 10,000 PSI
Perfect as a replacement for Vibra-Seal pre-coated parts
Prevents galling and protects mated threaded areas from rust and corrosion

**Q: Can this be used on plastic pipe**
A: Here is a copy and paste of the product description. "Formulated for metal, tapered ppe thread fittings. Protects threaded areas from rust and corrosion. Uses: head bolts, oil senders, oil and coolant lines, fuel fittings". Hope this helps.

**Q: What's the difference between this & Special Edition? I need 2 use it 2 seal inline fuel filter thread brass fitting 4 a motorcycle tank 2 carb.**
A: I tried a number of things to seal  a brass tee into a motorcycle oil pressure outlet. Nothing worked 'til I tried this stuff. Be sure to clean the threads well beforehand.  If the stuff is rated for fuel, I'm sure it'll work for your application. It's good stuff.

**Q: What's the difference between this & Special Edition? I need 2 use it 2 seal inline fuel filter thread brass fitting 4 a motorcycle tank 2 carb.**
A: The special edition is no doubt like many other products listed on Amazon a seller attempting to use the false label of a "special edition" to lure buyers to buy from them at a higher price, without prime shipping and more often than not slower shipping. I am willing to bet if you contact the maker of the product that they do not produce a "special edition".

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent Sealant for Automotive Use!
*by S***. on February 3, 2026*

used it to seal the differential plugs on my Ram 1500. It worked perfectly! The application was smooth and easy, and it provided a strong, leak-proof seal that gives me peace of mind. I really appreciate that it’s designed for high-temperature environments, which is essential for automotive applications. After driving for a while, I’ve had zero leaks and everything is holding up great. The tube size is convenient and has plenty of product for multiple uses. If you need a reliable, high-performance thread sealant for your vehicle, this is an excellent choice. Highly recommend for anyone doing differential or drivetrain work!

### ⭐⭐⭐⭐⭐ Great Seal, Great Heat Resistance
*by S***W on October 12, 2025*

I was installing a three-way valve and I didn’t have the means to pressure test my threaded connections until everything was threaded and sweated in place. Once the rest of the fittings were sweated together, I couldn’t tighten the threaded connections. The first time around, I used teflon tape and it didn’t work well. Next, I tried this permatex sealant because it would make a permanent anaerobic seal, and it can withstand sweating connections nearby. It worked great! The connection has been holding for months now with no water leaks. I recommend wearing nitrile or latex gloves when handling, it’ll let you work more quickly and cleanup easier.

### ⭐⭐⭐⭐⭐ Perfect high temperature thread sealant
*by J***S on October 12, 2025*

This thread sealant has never failed me. I used it about a year ago when I installed the coolant reroute onto the back of my Mazdaspeed miata engine. The sealant was used to install the hose barbs into the reroute itself. I also used this when I installed a coolant temperature sensor onto a coolant line on my Miata, this sealant was used on the probe that is screwed into the fitting on the line. The pictures are of the flyin miata coolant reroute and of the in line sensors both of which i used this thread sealant to screw in either the hose barbs into the reroute or the probe into the in line fitting. The sealant has performed flawlessly and never leaked.

## Frequently Bought Together

- Permatex 56521 High Performance Thread Sealant ,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/ Hand Tools 50 ml
- Permatex 85080 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, Sensor Safe And Non-Corrosive, For High Flex And Oil Resistant Applications 9.5 oz
- Permatex 22058 Dielectric Tune-Up Grease, 3oz. - High Performance Dielectric Grease Used To Protect Terminals, Spark Plugs, Wiring And Other Electrical Connections Against Salt, Dirt, And Corrosion

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-10*