---
product_id: 17035366
title: "Knock'er Loose Plus Penetrating Solvent - Rust and Corrosion - 11.5 oz | Fast-Acting Industrial Penetranting Solvent, Stuck Nut, Bolt, Screw and Hinge Loosening, Rust and Corrosion Dissolving"
brand: "crc"
price: "R$321"
currency: BRL
in_stock: true
reviews_count: 13
category: "Crc"
url: https://www.desertcart.com.br/products/17035366-knocker-loose-plus-penetrating-solvent-rust-and-corrosion-11-5
store_origin: BR
region: Brazil
---

# 50-state compliant, safe for no-flame zones Freeze-shock tech rapidly contracts metal 11.5 oz industrial-strength aerosol can Knock'er Loose Plus Penetrating Solvent - Rust and Corrosion - 11.5 oz | Fast-Acting Industrial Penetranting Solvent, Stuck Nut, Bolt, Screw and Hinge Loosening, Rust and Corrosion Dissolving

**Brand:** crc
**Price:** R$321
**Availability:** ✅ In Stock

## Summary

> ❄️ Unlock Rust’s Grip Before It Locks You Out!

## Quick Answers

- **What is this?** Knock'er Loose Plus Penetrating Solvent - Rust and Corrosion - 11.5 oz | Fast-Acting Industrial Penetranting Solvent, Stuck Nut, Bolt, Screw and Hinge Loosening, Rust and Corrosion Dissolving by crc
- **How much does it cost?** R$321 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/17035366-knocker-loose-plus-penetrating-solvent-rust-and-corrosion-11-5)

## Best For

- crc enthusiasts

## Why This Product

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

## Key Features

- • **Freeze Fast, Fix Faster:** Rapidly contracts rusted metal with innovative freeze-shock technology for instant loosening.
- • **Safe for Sensitive Zones:** 50-state compliant formula designed for no-flame environments—perfect for fuel and brake lines.
- • **Industrial Strength in a Can:** 11.5 oz aerosol delivers powerful penetrating solvent action for tough bolts and fittings.
- • **Trusted by Pros, Loved by DIYers:** CRC’s market-leading formula ensures reliable maintenance for marine, automotive, and industrial equipment.
- • **Versatile Rust & Corrosion Fighter:** Effectively dissolves rust on bolts, hinges, locks, and sliding mechanisms across multiple industries.

## Overview

CRC Knock'er Loose Plus is a 11.5 oz aerosol penetrating solvent featuring freeze-shock technology that rapidly contracts rusted metal to break bonds quickly. Its 50-state compliant, no-flame formula is ideal for safely loosening frozen bolts, fittings, and corrosion in industrial, automotive, and marine applications.

## Description

You know the moment: the bolt won't budge, the line's down, and every minute costs more than you want to admit. You don't need promises- you need movement. CRC Knock'er Loose Plus uses freeze-shock technology to rapidly lower the temperature of the metal, causing it to contract. This cracks the rust and creates space for the industrial strength solvent to rapidly break the bond. For use om no-flame zones, it's the go-to when heat isn't an option.

Review: Great product, works well on rusted parts! - Great working product.
Review: The best I've used so far at getting heavily rusted nuts/bolts apart - For $15 I was blown away at how well this stuff works. I needed to replace some exhaust parts on a nearly 20 year old car and the studs were completely rusted and looked like they would need to be cut out. I sprayed this on all of them and let it sit for a couple of hours before trying to remove them, fully expecting to break at least one of the studs off due to corrosion. Instead, when I came back a lot of the crusty looking rust was gone and after working the nuts back and forth I got all of them off without issue and was able to reuse them. It's an expensive spray but that bottle is a decent size and it sprays on easily. Whatever is in it works extremely effectively at lubricating through the rust and letting you get heavily rusted nuts off. Long story short, I highly recommend this stuff.

## Features

- CRC INDUSTRIES: A market leader that offers impeccably designed chemical solutions to maintain, protect and repair different marine, heavy-duty motor vehicles, industrial-grade engines, household tools and electrical equipment.
- PENETRATING SOLVENT: Best for freezing fasteners in fuel/brake lines or no-flame zones.
- UNIQUE FORMULA: Knock’er Loose offers a 50-state compliant formula that provides great performance in easing the disassembly of tools, automobile engines, plant machinery, and other equipment for routine maintenance.
- APPLICATIONS: Knock’er Loose works effectively to dissolve and loosen rust and corrosion from couplings, bolts, fittings, locks, washers, sliding mechanisms, hinges, bushings, nuts, and other frozen components.
- PRODUCT SPECIFICATIONS: This product is available in a 11.5 wt oz aerosol can.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0013IZS1O |
| Best Sellers Rank | #29,778 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #177 in Industrial Lubricants #588 in Oils |
| Brand | CRC |
| Brand Name | CRC |
| Compatible Material | Metal |
| Container Type | Can |
| Customer Reviews | 4.6 out of 5 stars 524 Reviews |
| Flash Point | 64 °C |
| Global Trade Identification Number | 00078254030272 |
| Included Components | Super Penetrant |
| Item Form | Spray |
| Item Type Name | Super Penetrant |
| Item Weight | 13.28 ounces |
| Liquid Volume | 11.5 fluid ounces |
| Manufacturer | CRC Industries |
| Material | Specialty compound |
| Model Number | 03027 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Package Information | Can |
| Part Number | 3027 |
| Recommended Uses For Product | Electrical |
| Specific Uses For Product | Prevent Corrosion |
| UPC | 078254030272 |
| Unit Count | 11.5 Ounce |

## Product Details

- **Brand:** CRC
- **Item Weight:** 13.28 ounces
- **Liquid Volume:** 11.5 fluid ounces
- **Material:** Specialty compound
- **Package Information:** Can

## Images

![Knock'er Loose Plus Penetrating Solvent - Rust and Corrosion - 11.5 oz | Fast-Acting Industrial Penetranting Solvent, Stuck Nut, Bolt, Screw and Hinge Loosening, Rust and Corrosion Dissolving - Image 1](https://m.media-amazon.com/images/I/51HRrmsV6DL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product, works well on rusted parts!
*by M***N on August 22, 2026*

Great working product.

### ⭐⭐⭐⭐⭐ The best I've used so far at getting heavily rusted nuts/bolts apart
*by A***A on October 15, 2025*

For $15 I was blown away at how well this stuff works. I needed to replace some exhaust parts on a nearly 20 year old car and the studs were completely rusted and looked like they would need to be cut out. I sprayed this on all of them and let it sit for a couple of hours before trying to remove them, fully expecting to break at least one of the studs off due to corrosion. Instead, when I came back a lot of the crusty looking rust was gone and after working the nuts back and forth I got all of them off without issue and was able to reuse them. It's an expensive spray but that bottle is a decent size and it sprays on easily. Whatever is in it works extremely effectively at lubricating through the rust and letting you get heavily rusted nuts off. Long story short, I highly recommend this stuff.

### ⭐⭐⭐⭐⭐ This stuff is amazing a must buy for any job
*by J***Z on May 20, 2026*

My Milwaukee hackzal was frozen and the pistion/blade would not move do to water the other day getting all over it from cutting water lines. So it was frozen and when pulling the trigger would not move just heard it click. tried WD40 and PB Blaster and did not work. Used CRC Knock'er loose and let sit for 10 mins and sure enough dam thing was working like brand new again. THIS STUFF ROCKS. I have used on froze bolts as well and have not found anything it will not work on.

## Frequently Bought Together

- CRC Knock’er Loose Plus Penetrating Solvent 03027 – [Reddish] 11.5 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant w/ Freeze Shock Action
- CRC Knock’er Loose Penetrating Solvent 03020 – [Reddish] 13 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant
- CRC Freeze-Off Super Penetrant, 11.5 oz

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**Shop now:** [https://www.desertcart.com.br/products/17035366-knocker-loose-plus-penetrating-solvent-rust-and-corrosion-11-5](https://www.desertcart.com.br/products/17035366-knocker-loose-plus-penetrating-solvent-rust-and-corrosion-11-5)

---

*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-09-07*