---
product_id: 258211059
title: "56521 High Performance Thread Sealant,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/Hand Tools 50 ml"
brand: "permatex"
price: "€ 30.59"
currency: EUR
in_stock: true
url: https://www.desertcart.ie/products/258211059-56521-high-performance-thread-sealant-thread-lock-and-screw-glue
store_origin: IE
region: Ireland
---

# 10,000 PSI cure 1000 PSI seal -60°F to 300°F 56521 High Performance Thread Sealant,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/Hand Tools 50 ml

**Brand:** permatex
**Price:** € 30.59
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal the Deal with Confidence!

## Quick Answers

- **What is this?** 56521 High Performance Thread Sealant,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/Hand Tools 50 ml by permatex
- **How much does it cost?** € 30.59 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/258211059-56521-high-performance-thread-sealant-thread-lock-and-screw-glue)

## 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:** Replaces tape and pipe dope with a smooth, reliable sealant for all projects.
- • **Rapid Curing Strength:** Cures quickly to handle up to 10,000 PSI, ideal for heavy-duty applications.
- • **Unmatched Sealing Power:** Combines thread sealant and blue thread locker for unbeatable hold.
- • **High-Pressure Performance:** Airtight and watertight seal up to 1000 PSI, perfect for tough conditions.
- • **Extreme Temperature Resistance:** Withstands temperatures from -60°F to 300°F, ensuring durability.

## Overview

Permatex 56521 High Performance Thread Sealant is a versatile solution designed to prevent loosening and corrosion of bolts, nuts, and fasteners. This 50 ml sealant offers a high-pressure, leak-proof seal, withstands extreme temperatures, and cures rapidly, making it perfect for both professional and DIY applications.

## Description

56521 High Performance Thread Sealant,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/Hand Tools 50 ml

## 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 |
|---------------|-------|
| Manufacturer | Permatex |
| Brand | Permatex |
| Product Dimensions | 20.32 x 7.62 x 5.08 cm; 49.9 g |
| Item model number | 56521 |
| Manufacturer Part Number | 56521 |
| OEM Part Number | 56521 |
| Item Weight | 49.9 g |

## Product Details

- **Material:** Rubber
- **Brand:** Permatex
- **Style:** Thread Sealant
- **Item weight:** 0.11 Pounds
- **Item dimensions L x W x H:** 20.3 x 7.6 x 5.1 centimeters

## Images

![56521 High Performance Thread Sealant,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/Hand Tools 50 ml - Image 1](https://m.media-amazon.com/images/I/71XJlR1DA2L.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".

## Frequently Bought Together

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-05*