---
product_id: 48736745
title: "Penetrant Spray, Loosens Rust on Nuts, Bolt & Locks, 400ml"
brand: "wd-40 specialist"
price: "103.43 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Wd 40 Specialist"
url: https://www.desertcart.tn/products/48736745-penetrant-spray-loosens-rust-on-nuts-bolt-and-locks-400ml
store_origin: TN
region: Tunisia
---

# 360° spray valve works -20°C to +90°C 400ml precision spray Penetrant Spray, Loosens Rust on Nuts, Bolt & Locks, 400ml

**Brand:** wd-40 specialist
**Price:** 103.43 DT
**Availability:** ✅ In Stock

## Summary

> 🛡️ Unlock Rust’s Grip with Pro-Level Precision!

## Quick Answers

- **What is this?** Penetrant Spray, Loosens Rust on Nuts, Bolt & Locks, 400ml by wd-40 specialist
- **How much does it cost?** 103.43 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/48736745-penetrant-spray-loosens-rust-on-nuts-bolt-and-locks-400ml)

## Best For

- wd-40 specialist enthusiasts

## Why This Product

- Trusted wd-40 specialist brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rapid Rust Release:** Penetrates deep to free seized bolts & locks fast
- • **All-Weather Warrior:** Performs reliably from freezing cold to scorching heat
- • **Precision Smart Straw:** Pinpoint accuracy or broad spray with 360° valve control
- • **Multi-Material Mastery:** Safe on metal, titanium, rubber, plastic & PVC
- • **Long-Lasting Protection:** Leaves water-resistant anti-corrosion barrier for extended maintenance intervals

## Overview

WD-40 Specialist Penetrant Spray is a professional-grade, 400ml aerosol designed to rapidly loosen rusted nuts, bolts, and locks. Engineered for multi-surface use including metal, titanium, rubber, and plastic, it operates effectively across a wide temperature range (-20°C to +90°C). Featuring a 360° spray valve and integrated Smart Straw, it delivers precise application in hard-to-reach areas while leaving a water-resistant barrier that protects against future corrosion. Trusted by mechanics and engineers, it’s the go-to solution for fast, reliable rust release and maintenance.

## Description

This professional-grade penetrant spray frees stuck parts, removes rust, and provides long-lasting lubrication. Ideal for automotive, marine, and industrial use.

Review: Works fast on stuck bolts – a must-have in the toolbox - I recently added the WD-40 Specialist Penetrant Spray to my toolkit, and it has already proven its value. I used it on a couple of stubborn, rusted bolts in my bike and an old garden tool, and within minutes the parts loosened up with very little effort. The spray penetrates quickly and doesn’t have the messy residue that some similar products leave behind. The nozzle gives a controlled spray, so you can target tight areas without wasting product. The smell is noticeable but not overpowering, and it doesn’t linger for long. One thing to keep in mind is that this is designed mainly as a penetrant and not as a long-term lubricant, so after freeing stuck parts it’s best to apply something else if you want ongoing protection. Overall, this is an effective, reliable product that does exactly what it promises. Definitely worth keeping on hand for household repairs, bikes, cars, or any mechanical projects.
Review: Very effective product - Very good stuff. It loosened a rusted nut and bolt on my scaffold tower. I’d tried everything to no avail but this worked really effectively.

## Features

- Causes skin irritation.
- Extremely flammable aerosol.
- May be fatal if swallowed and enters airways.
- May cause drowsiness or dizziness.
- Pressurised container: May burst if heated.
- Toxic to aquatic life with long lasting effects.
- Penetrating Oil for Rust: The low surface tension formula penetrates deep into rusted threads and corroded joints, rapidly freeing seized bolts, nuts, and fixings where general-purpose sprays fail, the professional's choice from WD-40 Specialist.
- Multi-Surface Rust Release: Loosens rusted hinges, stuck locks, and stiff chains while safe for use on metal, stainless steel, titanium, rubber, plastic, and PVC, performing reliably from -20°C to +90°C.
- Lasting Corrosion Protection: Deposits a water-resistant barrier that delivers anti-rust and corrosion protection to guard bearings, pipes, conveyor belts, and exposed fixings against future build-up to extend service intervals between maintenance.
- Professional-Grade Performance: Engineered for mechanics, engineers, and professionals who demand consistent results, this industrial-strength penetrating spray operates across a wide temperature range for workshop, garage, and field applications.
- Precision Smart Straw Control: Reach tight spaces and awkward angles with the integrated Smart Straw for pinpoint accuracy, or flip down for broad coverage, the 360° valve enables spraying in any orientation, reducing product waste and time.
- Specialist Maintenance System: Pre-clean with WD-40 Specialist Degreaser spray, apply Penetrant spray to free seized components, then protect with White Lithium Grease for lasting lubrication, or add Cutting Oil for drilling and metalwork.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B006UCJ5NU |
| Best Sellers Rank | 654 in DIY & Tools ( See Top 100 in DIY & Tools ) 9 in Lubricants |
| Brand | WD-40 Specialist |
| Brand Name | WD-40 Specialist |
| Compatible Material | metal,stainless steel,titanium,rubber,plastic,PVC |
| Container Type | Tin |
| Country of Origin | United Kingdom |
| Customer Reviews | 4.8 out of 5 stars 1,215 Reviews |
| Flash Point | 44 Degrees Celsius |
| Global Trade Identification Number | 05032227443488 |
| Included Components | 1 x WD40 Specialist Penetrant Aerosol 400Ml |
| Item Form | liquid |
| Item Highlight | Rust Penetrating Oil Spray, Smart Straw, Quickly Loosens All Stuck, Seized & Rusted, For Corroded Nuts, Bolts, Hinges & Locks |
| Item Type Name | Specialist Fast Release Penetrant with Smart Straw 400 ml |
| Item Weight | 374 Grams |
| Item weight | 374 Grams |
| Liquid Volume | 0.4 Litres |
| Liquid volume | 0.4 Litres |
| Manufacturer | WD-40 Company |
| Material | Grease , Metal, Plastic |
| Model Number | 7780195-HHW |
| Number of Items | 1 |
| Number of Packs | 1 |
| Package information | Tin |
| Part Number | 443488-BPSSA02589 |
| Product Warranty | Na. |
| Recommended Uses For Product | Automotive, Marine, Industrial, Nuts, Bolts, Screws, Locks, Pipes, Taps |
| Recommended uses for product | Automotive, Marine, Industrial, Nuts, Bolts, Screws, Locks, Pipes, Taps |
| SAE J300 Viscosity Grade | 0W |
| Specific Uses For Product | Car,Wheel,Window |
| UPC | 013523004028 616268302482 |
| Unit Count | 400.0 millilitre |
| Upper Temperature Rating | 90 Degrees Celsius |
| Viscosity | 0w |

## Product Details

- **Brand:** WD-40 Specialist
- **Item weight:** 374 Grams
- **Liquid volume:** 0.4 Litres
- **Material:** Grease, Metal, Plastic
- **Package information:** Tin

## Images

![Penetrant Spray, Loosens Rust on Nuts, Bolt & Locks, 400ml - Image 1](https://m.media-amazon.com/images/I/61gRmO22SaL.jpg)
![Penetrant Spray, Loosens Rust on Nuts, Bolt & Locks, 400ml - Image 2](https://m.media-amazon.com/images/I/71dCMOScI+L.jpg)
![Penetrant Spray, Loosens Rust on Nuts, Bolt & Locks, 400ml - Image 3](https://m.media-amazon.com/images/I/71rRAEL-EwL.jpg)
![Penetrant Spray, Loosens Rust on Nuts, Bolt & Locks, 400ml - Image 4](https://m.media-amazon.com/images/I/716o31AwodL.jpg)
![Penetrant Spray, Loosens Rust on Nuts, Bolt & Locks, 400ml - Image 5](https://m.media-amazon.com/images/I/71r9cQlxv+L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works fast on stuck bolts – a must-have in the toolbox
*by C***A on 30 September 2025*

I recently added the WD-40 Specialist Penetrant Spray to my toolkit, and it has already proven its value. I used it on a couple of stubborn, rusted bolts in my bike and an old garden tool, and within minutes the parts loosened up with very little effort. The spray penetrates quickly and doesn’t have the messy residue that some similar products leave behind. The nozzle gives a controlled spray, so you can target tight areas without wasting product. The smell is noticeable but not overpowering, and it doesn’t linger for long. One thing to keep in mind is that this is designed mainly as a penetrant and not as a long-term lubricant, so after freeing stuck parts it’s best to apply something else if you want ongoing protection. Overall, this is an effective, reliable product that does exactly what it promises. Definitely worth keeping on hand for household repairs, bikes, cars, or any mechanical projects.

### ⭐⭐⭐⭐⭐ Very effective product
*by D***L on 29 August 2026*

Very good stuff. It loosened a rusted nut and bolt on my scaffold tower. I’d tried everything to no avail but this worked really effectively.

### ⭐⭐⭐⭐⭐ Does what it says on the tin
*by L***T on 23 July 2026*

Worked well on seized bolts and rusty hinges. The Smart Straw makes it easy to apply accurately without wasting product. A useful addition to any toolbox.

## Frequently Bought Together

- WD-40 Specialist Penetrant Spray - Professional-Grade Lubrication for Mechanics and Industrial Applications - 400ml - Rust-Busting Formula
- WD-40 Specialist Silicone Spray Lubricant 400ml Can - Versatile All-Weather Protection for Extended Tool Life, Repels Moisture, Dust, and Grime - Smart Straw Applicator Included
- WD-40 Multi-Use Smart Straw 450ml Spray Aerosol Can Clean Rust Lubricant, blue

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**Shop now:** [https://www.desertcart.tn/products/48736745-penetrant-spray-loosens-rust-on-nuts-bolt-and-locks-400ml](https://www.desertcart.tn/products/48736745-penetrant-spray-loosens-rust-on-nuts-bolt-and-locks-400ml)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-09-02*