---
product_id: 294725653
title: "Permatex 56521 High Performance Thread Sealant, 50 ml"
brand: "permatex"
price: "5013 kr"
currency: ISK
in_stock: true
reviews_count: 5
category: "Permatex"
url: https://www.desertcart.is/products/294725653-permatex-56521-high-performance-thread-sealant-50-ml
store_origin: IS
region: Iceland
---

# Locks threads tight & leak-free Withstands -60°F to 300°F temps Cures fast for 10,000 PSI strength Permatex 56521 High Performance Thread Sealant, 50 ml

**Brand:** permatex
**Price:** 5013 kr
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal it like a pro, lock it for life!

## Quick Answers

- **What is this?** Permatex 56521 High Performance Thread Sealant, 50 ml by permatex
- **How much does it cost?** 5013 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/294725653-permatex-56521-high-performance-thread-sealant-50-ml)

## 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

- • **Mess-Free Application:** Ditch tape and pipe dope—smooth, clean, and professional-grade sealing in one compact tube.
- • **Unmatched Seal & Hold:** Combines thread sealant and blue thread locker for ultimate leak-proof security.
- • **Pressure-Proof Performance:** Seals fittings airtight and watertight up to 1,000 PSI—no leaks, no worries.
- • **Extreme Temperature Resilience:** Operates flawlessly from freezing -60°F to scorching 300°F without degradation.
- • **Rapid Cure, Heavy-Duty Strength:** Fast curing formula handles up to 10,000 PSI, perfect for demanding industrial and automotive tasks.

## Overview

Permatex 56521 High Performance Thread Sealant is a premium synthetic rubber formula that delivers a dual-action seal and thread lock. Designed for metal and tapered pipe fittings, it ensures leak-proof connections up to 1,000 PSI and cures rapidly to withstand pressures up to 10,000 PSI. Temperature resistant from -60°F to 300°F, it protects against rust, corrosion, and wear, making it the go-to solution for professionals and DIYers seeking durable, high-strength thread sealing without the mess of traditional tapes or dope.

## 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: If plumbers tape was a model T Ford, this is a Ferrari. Awesome product.
Review: Cumple con su objetivo

## Features

- Unbeatable Seal & Hold: Combines the sealing power of thread sealant with the firm hold of a blue thread locker, ensuring connections stay tight and leak-free even under pressure.
- High-Pressure, No-Leak Assurance: Delivers an airtight, watertight seal up to 1000 PSI, locking fittings securely against leaks in the toughest conditions.
- Temperature Resistant & Durable: Withstands extreme temperatures from -60°F to 300°F, protecting threads from rust, corrosion, and wear.
- Fast-Curing Strength: Rapidly cures to handle up to 10,000 PSI, making it perfect for heavy-duty applications like stainless steel fittings, oil lines, and fuel systems.
- No More Tape or Pipe Dope Needed: Replaces messy alternatives with a smooth, reliable sealant that’s designed for metal, tapered pipe thread fittings—ideal for professional and DIY projects alike.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000FW7VHI |
| Are batteries included? | No |
| Best Sellers Rank | #143,485 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #138 in Fillers, Adhesives & Sealants |
| Brand | Permatex |
| Colour | White |
| Country of Origin | USA |
| Customer Reviews | 4.7 4.7 out of 5 stars (534) |
| Date First Available | 19 January 2014 |
| Generic Name | Thread Sealant |
| Global Trade Identification Number | 00079340565210 |
| Included Components | Auto part, Automotive Accessories, Replacement and Performance parts |
| Item Dimensions LxWxH | 20.3 x 7.6 x 5.1 Centimeters |
| Item Form | Liquid |
| Item Height | 2 Inches |
| Item Weight | 49.9 g |
| Item Width | 3 Inches |
| Item dimensions L x W x H | 20.3 x 7.6 x 5.1 Centimeters |
| Item model number | 56521 |
| Manufacturer | Permatex |
| Material | Synthetic Rubber |
| Model number | 56521 |
| Net Quantity | 50.0 Milliliters |
| Number of Items | 1 |
| Product Dimensions | 20.32 x 7.62 x 5.08 cm; 49.9 g |
| Style | Compact |
| Surface Recommendation | Fixture |
| UPC | 079340565210 |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Permatex
- **Item Weight:** 0.11 Pounds
- **Item dimensions L x W x H:** 20.3 x 7.6 x 5.1 Centimeters
- **Material:** Synthetic Rubber
- **Style:** Compact

## Images

![Permatex 56521 High Performance Thread Sealant, 50 ml - Image 1](https://m.media-amazon.com/images/I/31h6pzIBefL.jpg)
![Permatex 56521 High Performance Thread Sealant, 50 ml - Image 2](https://m.media-amazon.com/images/I/414L+k4lOBL.jpg)
![Permatex 56521 High Performance Thread Sealant, 50 ml - Image 3](https://m.media-amazon.com/images/I/418zHmcdVPL.jpg)
![Permatex 56521 High Performance Thread Sealant, 50 ml - Image 4](https://m.media-amazon.com/images/I/41mtXuPAHuL.jpg)
![Permatex 56521 High Performance Thread Sealant, 50 ml - Image 5](https://m.media-amazon.com/images/I/51gY2vyZcgL.jpg)

## 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

### ⭐⭐⭐⭐⭐ Review
*by A***R on 31 May 2024*

If plumbers tape was a model T Ford, this is a Ferrari. Awesome product.

### ⭐⭐⭐⭐⭐ Review
*by P***E on 22 February 2024*

Cumple con su objetivo

### ⭐⭐⭐ Review
*by E***. on 25 February 2025*

El empaque del producto estaba abierto, lo cual demerita la presentación y se duda de la calidad.

## 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 Iceland*
*Store origin: IS*
*Last updated: 2026-01-28*